diff --git a/compos/aidl/com/android/compos/FdAnnotation.aidl b/compos/aidl/com/android/compos/FdAnnotation.aidl
deleted file mode 100644
index b910391..0000000
--- a/compos/aidl/com/android/compos/FdAnnotation.aidl
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- * Copyright (C) 2021 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.compos;
-
-/** {@hide} */
-parcelable FdAnnotation {
-    /**
-     * Input file descriptor numbers to be passed to the program.  This is currently assumed to be
-     * same as the file descriptor number used in the backend server.
-     */
-    int[] input_fds;
-
-    /**
-     * Output file descriptor numbers to be passed to the program.  This is currently assumed to be
-     * same as the file descriptor number used in the backend server.
-     */
-    int[] output_fds;
-}
diff --git a/compos/aidl/com/android/compos/ICompOsService.aidl b/compos/aidl/com/android/compos/ICompOsService.aidl
index b2b961a..39e9d61 100644
--- a/compos/aidl/com/android/compos/ICompOsService.aidl
+++ b/compos/aidl/com/android/compos/ICompOsService.aidl
@@ -17,7 +17,6 @@
 package com.android.compos;
 
 import com.android.compos.CompOsKeyData;
-import com.android.compos.FdAnnotation;
 
 /** {@hide} */
 interface ICompOsService {
@@ -51,21 +50,6 @@
             String zygoteArch, String systemServerCompilerFilter);
 
     /**
-     * Runs dexopt compilation encoded in the marshaled dexopt arguments.
-     *
-     * To keep ART indepdendantly updatable, the compilation arguments are not stabilized. As a
-     * result, the arguments are marshaled into byte array.  Upon received, the service asks ART to
-     * return relevant information (since ART is able to unmarshal its own encoding), in order to
-     * set up the execution context (mainly file descriptors for compiler input and output) then
-     * invokes the compiler.
-     *
-     * @param marshaledArguments The marshaled dexopt arguments.
-     * @param fd_annotation Additional file descriptor information of the execution.
-     * @return exit code
-     */
-    byte compile(in byte[] marshaledArguments, in FdAnnotation fd_annotation);
-
-    /**
      * Generate a new public/private key pair suitable for signing CompOs output files.
      *
      * @return a certificate for the public key and the encrypted private key
diff --git a/compos/src/compsvc.rs b/compos/src/compsvc.rs
index 356cc7e..b4af9b5 100644
--- a/compos/src/compsvc.rs
+++ b/compos/src/compsvc.rs
@@ -32,7 +32,6 @@
 use authfs_aidl_interface::aidl::com::android::virt::fs::IAuthFsService::IAuthFsService;
 use compos_aidl_interface::aidl::com::android::compos::{
     CompOsKeyData::CompOsKeyData,
-    FdAnnotation::FdAnnotation,
     ICompOsService::{BnCompOsService, ICompOsService},
 };
 use compos_aidl_interface::binder::{
@@ -113,10 +112,6 @@
         Ok(exit_code as i8)
     }
 
-    fn compile(&self, _marshaled: &[u8], _fd_annotation: &FdAnnotation) -> BinderResult<i8> {
-        Err(new_binder_exception(ExceptionCode::UNSUPPORTED_OPERATION, "Not yet implemented"))
-    }
-
     fn generateSigningKey(&self) -> BinderResult<CompOsKeyData> {
         to_binder_result(self.key_service.generate())
     }