diff --git a/common/aidl/aidl_api/android.hardware.common/current/android/hardware/common/SynchronizedReadWrite.aidl b/common/aidl/aidl_api/android.hardware.common/current/android/hardware/common/SynchronizedReadWrite.aidl
deleted file mode 100644
index aec3d6d..0000000
--- a/common/aidl/aidl_api/android.hardware.common/current/android/hardware/common/SynchronizedReadWrite.aidl
+++ /dev/null
@@ -1,22 +0,0 @@
-///////////////////////////////////////////////////////////////////////////////
-// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
-///////////////////////////////////////////////////////////////////////////////
-
-// This file is a snapshot of an AIDL interface (or parcelable). Do not try to
-// edit this file. It looks like you are doing that because you have modified
-// an AIDL interface in a backward-incompatible way, e.g., deleting a function
-// from an interface or a field from a parcelable and it broke the build. That
-// breakage is intended.
-//
-// You must not make a backward incompatible changes to the AIDL files built
-// with the aidl_interface module type with versions property set. The module
-// type is used to build AIDL files in a way that they can be used across
-// independently updatable components of the system. If a device is shipped
-// with such a backward incompatible change, it has a high risk of breaking
-// later when a module using the interface is updated, e.g., Mainline modules.
-
-package android.hardware.common;
-@VintfStability
-enum SynchronizedReadWrite {
-  EMPTY = 0,
-}
diff --git a/common/aidl/aidl_api/android.hardware.common/current/android/hardware/common/UnsynchronizedWrite.aidl b/common/aidl/aidl_api/android.hardware.common/current/android/hardware/common/UnsynchronizedWrite.aidl
deleted file mode 100644
index e390d20..0000000
--- a/common/aidl/aidl_api/android.hardware.common/current/android/hardware/common/UnsynchronizedWrite.aidl
+++ /dev/null
@@ -1,22 +0,0 @@
-///////////////////////////////////////////////////////////////////////////////
-// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
-///////////////////////////////////////////////////////////////////////////////
-
-// This file is a snapshot of an AIDL interface (or parcelable). Do not try to
-// edit this file. It looks like you are doing that because you have modified
-// an AIDL interface in a backward-incompatible way, e.g., deleting a function
-// from an interface or a field from a parcelable and it broke the build. That
-// breakage is intended.
-//
-// You must not make a backward incompatible changes to the AIDL files built
-// with the aidl_interface module type with versions property set. The module
-// type is used to build AIDL files in a way that they can be used across
-// independently updatable components of the system. If a device is shipped
-// with such a backward incompatible change, it has a high risk of breaking
-// later when a module using the interface is updated, e.g., Mainline modules.
-
-package android.hardware.common;
-@VintfStability
-enum UnsynchronizedWrite {
-  EMPTY = 0,
-}
diff --git a/common/aidl/android/hardware/common/MQDescriptor.aidl b/common/aidl/android/hardware/common/MQDescriptor.aidl
index 7e89b15..8997688 100644
--- a/common/aidl/android/hardware/common/MQDescriptor.aidl
+++ b/common/aidl/android/hardware/common/MQDescriptor.aidl
@@ -22,12 +22,9 @@
  * For use with libfmq. This is created from an instance of AidlMessageQueue,
  * and is used to pass information required to create another instance of that
  * queue for fast communication.
- * T - is used to specify the type of the payload
- * Flavor - is used to specify the type of the queue using
- * android.hardware.common.SynchronizedReadWrite or UnsynchronizedWrite
  */
 @VintfStability
-parcelable MQDescriptor<T, Flavor> {
+parcelable MQDescriptor {
     /*
      * Describes each of the grantors for the message queue. They are used to
      * get the readptr, writeptr, dataptr, and the optional EventFlag word
diff --git a/common/aidl/android/hardware/common/SynchronizedReadWrite.aidl b/common/aidl/android/hardware/common/SynchronizedReadWrite.aidl
deleted file mode 100644
index ef93bf2..0000000
--- a/common/aidl/android/hardware/common/SynchronizedReadWrite.aidl
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
- * Copyright 2020 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 android.hardware.common;
-
-/*
- * For use with android.hardware.common.MQDescriptor to specify which type of
- * queue to use. SynchronizedReadWrite is single reader, single writer, with no
- * overflow. All messages written need to be read.
- */
-@VintfStability
-enum SynchronizedReadWrite {
-    EMPTY,
-}
diff --git a/common/aidl/android/hardware/common/UnsynchronizedWrite.aidl b/common/aidl/android/hardware/common/UnsynchronizedWrite.aidl
deleted file mode 100644
index aa27c8d..0000000
--- a/common/aidl/android/hardware/common/UnsynchronizedWrite.aidl
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
- * Copyright 2020 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 android.hardware.common;
-
-/*
- * For use with android.hardware.common.MQDescriptor to specify which type of
- * queue to use. UnsynchronizedWrite is single writer, multiple reader, with
- * overflow. If messages are not read fast enough, they can be overwritten.
- */
-@VintfStability
-enum UnsynchronizedWrite {
-    EMPTY,
-}