remove code from old picture serial guard

Bug: skia:
Change-Id: If50a76c7f570d6e88f6583d381d0354568398039
Reviewed-on: https://skia-review.googlesource.com/97060
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Mike Reed <reed@google.com>
5 files changed