This removes second reference for frame 3 in GOF predefined for 3 temporal layers since encoder never use that reference. Bug: webrtc:9245 Change-Id: I6fbdbe7d3c753dda7fbcfcbd05f3530f70f80728 Reviewed-on: https://webrtc-review.googlesource.com/74705 Reviewed-by: Åsa Persson <asapersson@webrtc.org> Reviewed-by: Marco Paniconi <marpan@google.com> Commit-Queue: Sergey Silkin <ssilkin@webrtc.org> Cr-Commit-Position: refs/heads/master@{#23193}