diff --git a/libs/vr/libdvrcommon/Android.bp b/libs/vr/libdvrcommon/Android.bp
index 81404a4..eb78348 100644
--- a/libs/vr/libdvrcommon/Android.bp
+++ b/libs/vr/libdvrcommon/Android.bp
@@ -14,8 +14,6 @@
 
 sourceFiles = [
     "frame_time_history.cpp",
-    "revision.cpp",
-    "revision_path.cpp",
     "sync_util.cpp",
 ]
 
diff --git a/libs/vr/libdvrcommon/include/private/dvr/revision.h b/libs/vr/libdvrcommon/include/private/dvr/revision.h
deleted file mode 100644
index dda0fce..0000000
--- a/libs/vr/libdvrcommon/include/private/dvr/revision.h
+++ /dev/null
@@ -1,47 +0,0 @@
-#ifndef LIBS_VR_LIBDVRCOMMON_INCLUDE_PRIVATE_DVR_REVISION_H_
-#define LIBS_VR_LIBDVRCOMMON_INCLUDE_PRIVATE_DVR_REVISION_H_
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-// List of DreamOS products
-typedef enum DvrProduct {
-  DVR_PRODUCT_UNKNOWN,
-  DVR_PRODUCT_A00,
-  DVR_PRODUCT_A65R,
-  DVR_PRODUCT_TWILIGHT = DVR_PRODUCT_A65R
-} DvrProduct;
-
-// List of possible revisions.
-typedef enum DvrRevision {
-  DVR_REVISION_UNKNOWN,
-  DVR_REVISION_P1,
-  DVR_REVISION_P2,
-  DVR_REVISION_P3,
-} DvrRevision;
-
-// Query the device's product.
-//
-// @return DvrProduct value, or DvrProductUnknown on error.
-DvrProduct dvr_get_product();
-
-// Query the device's revision.
-//
-// @return DvrRevision value, or DvrRevisionUnknown on error.
-DvrRevision dvr_get_revision();
-
-// Returns the device's board revision string.
-//
-// @return NULL-terminated string such as 'a00-p1'.
-const char* dvr_get_product_revision_str();
-
-// Returns the device's serial number.
-//
-// @return Returns NULL on error, or a NULL-terminated string.
-const char* dvr_get_serial_number();
-
-#ifdef __cplusplus
-}
-#endif  // extern "C"
-#endif  // LIBS_VR_LIBDVRCOMMON_INCLUDE_PRIVATE_DVR_REVISION_H_
diff --git a/libs/vr/libdvrcommon/revision.cpp b/libs/vr/libdvrcommon/revision.cpp
deleted file mode 100644
index 7925f65..0000000
--- a/libs/vr/libdvrcommon/revision.cpp
+++ /dev/null
@@ -1,175 +0,0 @@
-#include "private/dvr/revision.h"
-
-#include <errno.h>
-#include <fcntl.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/mman.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <log/log.h>
-
-#include "revision_path.h"
-
-namespace {
-
-// Allows quicker access to the product revision. If non-zero, then
-// the product revision file has already been processed.
-static bool global_product_revision_processed = false;
-
-static bool global_serial_number_processed = false;
-
-// The product.
-static DvrProduct global_product = DVR_PRODUCT_UNKNOWN;
-
-// The revision.
-static DvrRevision global_revision = DVR_REVISION_UNKNOWN;
-
-// Maximum size of the product revision string.
-constexpr int kProductRevisionStringSize = 32;
-
-// Maximum size of the serial number.
-constexpr int kSerialNumberStringSize = 32;
-
-// The product revision string.
-static char global_product_revision_str[kProductRevisionStringSize + 1] = "";
-
-// The serial number string
-static char global_serial_number[kSerialNumberStringSize + 1] = "";
-
-// Product and revision combinations.
-struct DvrProductRevision {
-  const char* str;
-  DvrProduct product;
-  DvrRevision revision;
-};
-
-// Null-terminated list of all product and revision combinations.
-static constexpr DvrProductRevision kProductRevisions[] = {
-    {"a00-p1", DVR_PRODUCT_A00, DVR_REVISION_P1},
-    {"a00-p2", DVR_PRODUCT_A00, DVR_REVISION_P2},
-    {"a00-p3", DVR_PRODUCT_A00, DVR_REVISION_P3},
-    {"twilight-p1", DVR_PRODUCT_A65R, DVR_REVISION_P1},
-    {"twilight-p2", DVR_PRODUCT_A65R, DVR_REVISION_P2},
-    {NULL, DVR_PRODUCT_UNKNOWN, DVR_REVISION_UNKNOWN}};
-
-// Read the product revision string, and store the global data.
-static void process_product_revision() {
-  int fd;
-  ssize_t read_rc;
-  const DvrProductRevision* product_revision = kProductRevisions;
-
-  // Of course in a multi-threaded environment, for a few microseconds
-  // during process startup, it is possible that this function will be
-  // called and execute fully multiple times. That is why the product
-  // revision string is statically allocated.
-
-  if (global_product_revision_processed)
-    return;
-
-  // Whether there was a failure or not, we don't want to do this again.
-  // Upon failure it's most likely to fail again anyway.
-
-  fd = open(dvr_product_revision_file_path(), O_RDONLY);
-  if (fd < 0) {
-    ALOGE("Could not open '%s' to get product revision: %s",
-          dvr_product_revision_file_path(), strerror(errno));
-    global_product_revision_processed = true;
-    return;
-  }
-
-  read_rc = read(fd, global_product_revision_str, kProductRevisionStringSize);
-  if (read_rc <= 0) {
-    ALOGE("Could not read from '%s': %s", dvr_product_revision_file_path(),
-          strerror(errno));
-    global_product_revision_processed = true;
-    return;
-  }
-
-  close(fd);
-
-  global_product_revision_str[read_rc] = '\0';
-
-  while (product_revision->str) {
-    if (!strcmp(product_revision->str, global_product_revision_str))
-      break;
-    product_revision++;
-  }
-
-  if (product_revision->str) {
-    global_product = product_revision->product;
-    global_revision = product_revision->revision;
-  } else {
-    ALOGE("Unable to match '%s' to a product/revision.",
-          global_product_revision_str);
-  }
-
-  global_product_revision_processed = true;
-}
-
-}  // anonymous namespace
-
-extern "C" DvrProduct dvr_get_product() {
-  process_product_revision();
-  return global_product;
-}
-
-extern "C" DvrRevision dvr_get_revision() {
-  process_product_revision();
-  return global_revision;
-}
-
-extern "C" const char* dvr_get_product_revision_str() {
-  process_product_revision();
-  return global_product_revision_str;
-}
-
-extern "C" const char* dvr_get_serial_number() {
-  process_product_revision();
-  if (global_product == DVR_PRODUCT_A00) {
-    if (!global_serial_number_processed) {
-#ifdef DVR_HOST
-      global_serial_number_processed = true;
-#else
-      int width = 4;
-      uintptr_t addr = 0x00074138;
-      uintptr_t endaddr = addr + width - 1;
-
-      int fd = open("/dev/mem", O_RDWR | O_SYNC);
-      if (fd < 0) {
-        if (errno == EPERM)
-          global_serial_number_processed = true;
-        fprintf(stderr, "cannot open /dev/mem\n");
-        return global_serial_number;
-      }
-
-      off64_t mmap_start = addr & ~(PAGE_SIZE - 1);
-      size_t mmap_size = endaddr - mmap_start + 1;
-      mmap_size = (mmap_size + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1);
-
-      void* page = mmap64(0, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd,
-                          mmap_start);
-
-      if (page == MAP_FAILED) {
-        global_serial_number_processed = true;
-        fprintf(stderr, "cannot mmap region\n");
-        close(fd);
-        return global_serial_number;
-      }
-
-      uint32_t* x =
-          reinterpret_cast<uint32_t*>((((uintptr_t)page) + (addr & 4095)));
-      snprintf(global_serial_number, kSerialNumberStringSize, "%08x", *x);
-      global_serial_number_processed = true;
-
-      munmap(page, mmap_size);
-      close(fd);
-#endif
-    }
-    return global_serial_number;
-  } else {
-    return nullptr;
-  }
-}
diff --git a/libs/vr/libdvrcommon/revision_path.cpp b/libs/vr/libdvrcommon/revision_path.cpp
deleted file mode 100644
index c49f9aa..0000000
--- a/libs/vr/libdvrcommon/revision_path.cpp
+++ /dev/null
@@ -1,15 +0,0 @@
-#include "revision_path.h"
-
-namespace {
-
-// The path to the product revision file.
-static const char* kProductRevisionFilePath =
-    "/sys/firmware/devicetree/base/goog,board-revision";
-
-}  // anonymous namespace
-
-// This exists in a separate file so that it can be replaced for
-// testing.
-const char* dvr_product_revision_file_path() {
-  return kProductRevisionFilePath;
-}
diff --git a/libs/vr/libdvrcommon/revision_path.h b/libs/vr/libdvrcommon/revision_path.h
deleted file mode 100644
index afcea46..0000000
--- a/libs/vr/libdvrcommon/revision_path.h
+++ /dev/null
@@ -1,9 +0,0 @@
-#ifndef ANDROID_DVR_LIBDVRCOMMON_REVISION_PATH_H_
-#define ANDROID_DVR_LIBDVRCOMMON_REVISION_PATH_H_
-
-// Returns the revision file path.
-// This exists in a separate file so that it can be replaced for
-// testing.
-const char* dvr_product_revision_file_path();
-
-#endif  // ANDROID_DVR_LIBDVRCOMMON_REVISION_PATH_H_
diff --git a/libs/vr/libdvrcommon/tests/revision_app_tests.cpp b/libs/vr/libdvrcommon/tests/revision_app_tests.cpp
deleted file mode 100644
index 772481b..0000000
--- a/libs/vr/libdvrcommon/tests/revision_app_tests.cpp
+++ /dev/null
@@ -1,34 +0,0 @@
-#include <dvr/test/app_test.h>
-#include <gtest/gtest.h>
-#include <private/dvr/revision.h>
-
-// Making sure this information is not available
-// inside the sandbox
-
-namespace {
-
-TEST(RevisionTests, GetProduct) {
-  ASSERT_EQ(DVR_PRODUCT_UNKNOWN, dvr_get_product());
-}
-
-TEST(RevisionTests, GetRevision) {
-  ASSERT_EQ(DVR_REVISION_UNKNOWN, dvr_get_revision());
-}
-
-TEST(RevisionTests, GetRevisionStr) {
-  ASSERT_STREQ("", dvr_get_product_revision_str());
-}
-
-TEST(RevisionTests, GetSerialNo) {
-  ASSERT_EQ(nullptr, dvr_get_serial_number());
-}
-
-}  // namespace
-
-int main(int argc, char* argv[]) {
-  dreamos::test::AppTestBegin();
-  ::testing::InitGoogleTest(&argc, argv);
-  int result = RUN_ALL_TESTS();
-  dreamos::test::AppTestEnd(result);
-  return result;
-}
diff --git a/libs/vr/libdvrcommon/tests/revision_tests.cpp b/libs/vr/libdvrcommon/tests/revision_tests.cpp
deleted file mode 100644
index 9abf480..0000000
--- a/libs/vr/libdvrcommon/tests/revision_tests.cpp
+++ /dev/null
@@ -1,27 +0,0 @@
-#include <gtest/gtest.h>
-#include <private/dvr/revision.h>
-
-namespace {
-
-TEST(RevisionTests, GetProduct) {
-  ASSERT_NE(DVR_PRODUCT_UNKNOWN, dvr_get_product());
-}
-
-TEST(RevisionTests, GetRevision) {
-  ASSERT_NE(DVR_REVISION_UNKNOWN, dvr_get_revision());
-}
-
-TEST(RevisionTests, GetRevisionStr) {
-  ASSERT_NE(nullptr, dvr_get_product_revision_str());
-}
-
-TEST(RevisionTests, GetSerialNo) {
-  ASSERT_NE(nullptr, dvr_get_serial_number());
-}
-
-}  // namespace
-
-int main(int argc, char* argv[]) {
-  ::testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}