Remove not used SurfacePixelLayout from GLSurfaceFormat

Bug: 928873
Change-Id: If88e7712d01660343c743373ac2bebee109882bf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1610470
Reviewed-by: Antoine Labour <piman@chromium.org>
Commit-Queue: Peng Huang <penghuang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#659200}
3 files changed