Revert "Add hash for the unfrozen version in aidl metadata" am: 9a3917c7c0

Original change: https://android-review.googlesource.com/c/platform/system/tools/aidl/+/2431772

Change-Id: Ia1ef581ef556b88992b80e20ea01049532e3c4e3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>