Cleanup licensing metadata am: db7e7f0f8f am: cca6886583 am: 92788fad9a am: 1d4bc2bed6

Original change: https://android-review.googlesource.com/c/platform/external/wayland-protocols/+/1740857

Change-Id: Ia977fca072eb7949a9560558ae64e4e36c4c7467