Merge "Delete prebuilts not referenced by Soong." am: 08f954aa1d

Original change: https://android-review.googlesource.com/c/platform/prebuilts/tools/+/2299059

Change-Id: I6600a4b461dd6da59bf5e3fb1cbbb6b2620bf038
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>