diff --git a/compos/src/compilation.rs b/compos/src/compilation.rs
index 9a23bf5..6db31b6 100644
--- a/compos/src/compilation.rs
+++ b/compos/src/compilation.rs
@@ -14,31 +14,27 @@
  * limitations under the License.
  */
 
-use anyhow::{anyhow, bail, Context, Result};
-use log::{debug, error, info, warn};
+use anyhow::{bail, Context, Result};
+use log::{debug, info, warn};
 use minijail::{self, Minijail};
 use regex::Regex;
 use std::env;
 use std::ffi::OsString;
-use std::fs::{read_dir, File};
-use std::os::unix::io::{AsRawFd, RawFd};
+use std::fs::read_dir;
+use std::os::unix::io::AsRawFd;
 use std::path::{self, Path, PathBuf};
 use std::process::Command;
 
 use crate::artifact_signer::ArtifactSigner;
 use crate::compos_key_service::Signer;
-use crate::fsverity;
 use authfs_aidl_interface::aidl::com::android::virt::fs::{
     AuthFsConfig::{
         AuthFsConfig, InputDirFdAnnotation::InputDirFdAnnotation,
-        InputFdAnnotation::InputFdAnnotation, OutputDirFdAnnotation::OutputDirFdAnnotation,
-        OutputFdAnnotation::OutputFdAnnotation,
+        OutputDirFdAnnotation::OutputDirFdAnnotation,
     },
-    IAuthFs::IAuthFs,
     IAuthFsService::IAuthFsService,
 };
 use authfs_aidl_interface::binder::{ParcelFileDescriptor, Strong};
-use compos_aidl_interface::aidl::com::android::compos::FdAnnotation::FdAnnotation;
 use compos_common::odrefresh::ExitCode;
 
 const FD_SERVER_PORT: i32 = 3264; // TODO: support dynamic port
@@ -47,23 +43,6 @@
 /// meaningless in the current process.
 pub type PseudoRawFd = i32;
 
-pub enum CompilerOutput {
-    /// Fs-verity digests of output files, if the compiler finishes successfully.
-    Digests {
-        oat: fsverity::Sha256Digest,
-        vdex: fsverity::Sha256Digest,
-        image: fsverity::Sha256Digest,
-    },
-    /// Exit code returned by the compiler, if not 0.
-    ExitCode(i8),
-}
-
-struct CompilerOutputParcelFds {
-    oat: ParcelFileDescriptor,
-    vdex: ParcelFileDescriptor,
-    image: ParcelFileDescriptor,
-}
-
 pub struct OdrefreshContext<'a> {
     system_dir_fd: i32,
     output_dir_fd: i32,
@@ -259,131 +238,6 @@
     Ok(())
 }
 
-/// Runs the compiler with given flags with file descriptors described in `fd_annotation` retrieved
-/// via `authfs_service`. Returns exit code of the compiler process.
-pub fn compile_cmd(
-    compiler_path: &Path,
-    compiler_args: &[String],
-    authfs_service: Strong<dyn IAuthFsService>,
-    fd_annotation: &FdAnnotation,
-) -> Result<CompilerOutput> {
-    // Mount authfs (via authfs_service). The authfs instance unmounts once the `authfs` variable
-    // is out of scope.
-    let authfs_config = build_authfs_config(fd_annotation);
-    let authfs = authfs_service.mount(&authfs_config)?;
-
-    // The task expects to receive FD numbers that match its flags (e.g. --zip-fd=42) prepared
-    // on the host side. Since the local FD opened from authfs (e.g. /authfs/42) may not match
-    // the task's expectation, prepare a FD mapping and let minijail prepare the correct FD
-    // setup.
-    let fd_mapping =
-        open_authfs_files_for_fd_mapping(&authfs, &authfs_config).context("Open on authfs")?;
-
-    let jail =
-        spawn_jailed_task(compiler_path, compiler_args, fd_mapping).context("Spawn dex2oat")?;
-    let jail_result = jail.wait();
-
-    let parcel_fds = parse_compiler_args(&authfs, compiler_args)?;
-    let oat_file: &File = parcel_fds.oat.as_ref();
-    let vdex_file: &File = parcel_fds.vdex.as_ref();
-    let image_file: &File = parcel_fds.image.as_ref();
-
-    match jail_result {
-        Ok(()) => Ok(CompilerOutput::Digests {
-            oat: fsverity::measure(oat_file.as_raw_fd())?,
-            vdex: fsverity::measure(vdex_file.as_raw_fd())?,
-            image: fsverity::measure(image_file.as_raw_fd())?,
-        }),
-        Err(minijail::Error::ReturnCode(exit_code)) => {
-            error!("dex2oat failed with exit code {}", exit_code);
-            Ok(CompilerOutput::ExitCode(exit_code as i8))
-        }
-        Err(e) => {
-            bail!("Unexpected minijail error: {}", e)
-        }
-    }
-}
-
-fn parse_compiler_args(
-    authfs: &Strong<dyn IAuthFs>,
-    args: &[String],
-) -> Result<CompilerOutputParcelFds> {
-    const OAT_FD_PREFIX: &str = "--oat-fd=";
-    const VDEX_FD_PREFIX: &str = "--output-vdex-fd=";
-    const IMAGE_FD_PREFIX: &str = "--image-fd=";
-    const APP_IMAGE_FD_PREFIX: &str = "--app-image-fd=";
-
-    let mut oat = None;
-    let mut vdex = None;
-    let mut image = None;
-
-    for arg in args {
-        if let Some(value) = arg.strip_prefix(OAT_FD_PREFIX) {
-            let fd = value.parse::<RawFd>().context("Invalid --oat-fd flag")?;
-            debug_assert!(oat.is_none());
-            oat = Some(authfs.openFile(fd, false)?);
-        } else if let Some(value) = arg.strip_prefix(VDEX_FD_PREFIX) {
-            let fd = value.parse::<RawFd>().context("Invalid --output-vdex-fd flag")?;
-            debug_assert!(vdex.is_none());
-            vdex = Some(authfs.openFile(fd, false)?);
-        } else if let Some(value) = arg.strip_prefix(IMAGE_FD_PREFIX) {
-            let fd = value.parse::<RawFd>().context("Invalid --image-fd flag")?;
-            debug_assert!(image.is_none());
-            image = Some(authfs.openFile(fd, false)?);
-        } else if let Some(value) = arg.strip_prefix(APP_IMAGE_FD_PREFIX) {
-            let fd = value.parse::<RawFd>().context("Invalid --app-image-fd flag")?;
-            debug_assert!(image.is_none());
-            image = Some(authfs.openFile(fd, false)?);
-        }
-    }
-
-    Ok(CompilerOutputParcelFds {
-        oat: oat.ok_or_else(|| anyhow!("Missing --oat-fd"))?,
-        vdex: vdex.ok_or_else(|| anyhow!("Missing --vdex-fd"))?,
-        image: image.ok_or_else(|| anyhow!("Missing --image-fd or --app-image-fd"))?,
-    })
-}
-
-fn build_authfs_config(fd_annotation: &FdAnnotation) -> AuthFsConfig {
-    AuthFsConfig {
-        port: FD_SERVER_PORT,
-        inputFdAnnotations: fd_annotation
-            .input_fds
-            .iter()
-            .map(|fd| InputFdAnnotation { fd: *fd })
-            .collect(),
-        outputFdAnnotations: fd_annotation
-            .output_fds
-            .iter()
-            .map(|fd| OutputFdAnnotation { fd: *fd })
-            .collect(),
-        ..Default::default()
-    }
-}
-
-fn open_authfs_files_for_fd_mapping(
-    authfs: &Strong<dyn IAuthFs>,
-    config: &AuthFsConfig,
-) -> Result<Vec<(ParcelFileDescriptor, PseudoRawFd)>> {
-    let mut fd_mapping = Vec::new();
-
-    let results: Result<Vec<_>> = config
-        .inputFdAnnotations
-        .iter()
-        .map(|annotation| Ok((authfs.openFile(annotation.fd, false)?, annotation.fd)))
-        .collect();
-    fd_mapping.append(&mut results?);
-
-    let results: Result<Vec<_>> = config
-        .outputFdAnnotations
-        .iter()
-        .map(|annotation| Ok((authfs.openFile(annotation.fd, true)?, annotation.fd)))
-        .collect();
-    fd_mapping.append(&mut results?);
-
-    Ok(fd_mapping)
-}
-
 fn spawn_jailed_task(
     executable: &Path,
     args: &[String],
diff --git a/compos/src/compsvc.rs b/compos/src/compsvc.rs
index 28bf5d9..356cc7e 100644
--- a/compos/src/compsvc.rs
+++ b/compos/src/compsvc.rs
@@ -26,14 +26,12 @@
 use std::path::PathBuf;
 use std::sync::RwLock;
 
-use crate::compilation::{compile_cmd, odrefresh, CompilerOutput, OdrefreshContext};
+use crate::compilation::{odrefresh, OdrefreshContext};
 use crate::compos_key_service::{CompOsKeyService, Signer};
 use crate::dice::Dice;
-use crate::fsverity;
 use authfs_aidl_interface::aidl::com::android::virt::fs::IAuthFsService::IAuthFsService;
 use compos_aidl_interface::aidl::com::android::compos::{
     CompOsKeyData::CompOsKeyData,
-    CompilationResult::CompilationResult,
     FdAnnotation::FdAnnotation,
     ICompOsService::{BnCompOsService, ICompOsService},
 };
@@ -43,12 +41,10 @@
 use compos_common::odrefresh::ODREFRESH_PATH;
 
 const AUTHFS_SERVICE_NAME: &str = "authfs_service";
-const DEX2OAT_PATH: &str = "/apex/com.android.art/bin/dex2oat64";
 
 /// Constructs a binder object that implements ICompOsService.
 pub fn new_binder() -> Result<Strong<dyn ICompOsService>> {
     let service = CompOsService {
-        dex2oat_path: PathBuf::from(DEX2OAT_PATH),
         odrefresh_path: PathBuf::from(ODREFRESH_PATH),
         key_service: CompOsKeyService::new()?,
         key_blob: RwLock::new(Vec::new()),
@@ -57,21 +53,12 @@
 }
 
 struct CompOsService {
-    dex2oat_path: PathBuf,
     odrefresh_path: PathBuf,
     key_service: CompOsKeyService,
     key_blob: RwLock<Vec<u8>>,
 }
 
 impl CompOsService {
-    fn generate_raw_fsverity_signature(
-        &self,
-        fsverity_digest: &fsverity::Sha256Digest,
-    ) -> BinderResult<Vec<u8>> {
-        let formatted_digest = fsverity::to_formatted_digest(fsverity_digest);
-        to_binder_result(self.new_signer()?.sign(&formatted_digest[..]))
-    }
-
     fn new_signer(&self) -> BinderResult<Signer> {
         let key = &*self.key_blob.read().unwrap();
         if key.is_empty() {
@@ -126,34 +113,6 @@
         Ok(exit_code as i8)
     }
 
-    fn compile_cmd(
-        &self,
-        args: &[String],
-        fd_annotation: &FdAnnotation,
-    ) -> BinderResult<CompilationResult> {
-        let authfs_service = get_authfs_service()?;
-        let output = to_binder_result(
-            compile_cmd(&self.dex2oat_path, args, authfs_service, fd_annotation)
-                .context("Compilation failed"),
-        )?;
-        match output {
-            CompilerOutput::Digests { oat, vdex, image } => {
-                let oat_signature = self.generate_raw_fsverity_signature(&oat)?;
-                let vdex_signature = self.generate_raw_fsverity_signature(&vdex)?;
-                let image_signature = self.generate_raw_fsverity_signature(&image)?;
-                Ok(CompilationResult {
-                    exitCode: 0,
-                    oatSignature: oat_signature,
-                    vdexSignature: vdex_signature,
-                    imageSignature: image_signature,
-                })
-            }
-            CompilerOutput::ExitCode(exit_code) => {
-                Ok(CompilationResult { exitCode: exit_code, ..Default::default() })
-            }
-        }
-    }
-
     fn compile(&self, _marshaled: &[u8], _fd_annotation: &FdAnnotation) -> BinderResult<i8> {
         Err(new_binder_exception(ExceptionCode::UNSUPPORTED_OPERATION, "Not yet implemented"))
     }
diff --git a/compos/src/fsverity.rs b/compos/src/fsverity.rs
index a1e2314..f5df5f7 100644
--- a/compos/src/fsverity.rs
+++ b/compos/src/fsverity.rs
@@ -20,20 +20,8 @@
 use std::io;
 use std::os::unix::io::RawFd;
 
-/// Magic used in fs-verity digest
-const FS_VERITY_MAGIC: &[u8; 8] = b"FSVerity";
-
-/// Hash algorithm to use from linux/fsverity.h
-const FS_VERITY_HASH_ALG_SHA256: u8 = 1;
-
 const SHA256_HASH_SIZE: usize = 32;
 
-/// Size of `struct fsverity_formatted_digest` with SHA-256 in bytes.
-const FORMATTED_SHA256_DIGEST_SIZE: usize = 12 + SHA256_HASH_SIZE;
-
-/// Bytes of `struct fsverity_formatted_digest` in Linux with SHA-256.
-pub type FormattedSha256Digest = [u8; FORMATTED_SHA256_DIGEST_SIZE];
-
 /// Bytes of SHA256 digest
 pub type Sha256Digest = [u8; SHA256_HASH_SIZE];
 
@@ -56,12 +44,3 @@
         Ok(buf)
     }
 }
-
-pub fn to_formatted_digest(digest: &Sha256Digest) -> FormattedSha256Digest {
-    let mut formatted_digest: FormattedSha256Digest = [0; FORMATTED_SHA256_DIGEST_SIZE];
-    formatted_digest[0..8].copy_from_slice(FS_VERITY_MAGIC);
-    formatted_digest[8..10].copy_from_slice(&(FS_VERITY_HASH_ALG_SHA256 as u16).to_le_bytes());
-    formatted_digest[10..12].copy_from_slice(&(SHA256_HASH_SIZE as u16).to_le_bytes());
-    formatted_digest[12..].copy_from_slice(digest);
-    formatted_digest
-}