Delete a couple of abi dumps to be added in next commit am: 929b0517c0 am: f988b36bdb

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

Change-Id: I0a618219fd5cdb9252c3f8d962213962a55e3ba7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>