Delete a couple of abi dumps to be added in next commit am: 929b0517c0

Original change: https://android-review.googlesource.com/c/platform/prebuilts/abi-dumps/ndk/+/2806156

Change-Id: Id87dd70e052ab3e19152224c555b4e11fbcc2679
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>