Remove redundant notice property. am: 7bf45ef7d5 am: ef055fd982

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/exoplayer/+/19306164

Change-Id: Ia63821af1f2e749636686b2791dca66108e69008
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>