remove linear sRGB singleton

Cq-Include-Trybots: luci.chromium.try:linux-blink-rel
Change-Id: I01e2515cfa8e5356ee862ea7184bb7ceb4c9176f
Reviewed-on: https://skia-review.googlesource.com/c/192038
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
4 files changed