Remove unused clang-r487747. am: f06ee55440

Original change: https://googleplex-android-review.googlesource.com/c/platform/prebuilts/clang/host/darwin-x86/+/23372277

Change-Id: I12072db287f25f97c08a409d9149af757dd606d7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>