tree 21348e936c8e2201da49738c8acbbf7afc52b2ab
parent 8b3ca26b6db45f9a624070f95e3bba4b4c6d44f7
author elliottk <elliottk@google.com> 1539232944 -0700
committer Elliott Karpilovsky <elliottk@google.com> 1540513205 +0000

Remove alpha channel references (unsupported)

BUG=aomedia:2199

Change-Id: Ie4ec204a4c6cd97786fd9301d0d395f117090111