Remove redundant notice property. am: 7bf45ef7d5

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

Change-Id: I61c632d601da2d36394a1e0f9771918ea6d6b531
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>