Revert of Progress on gamma-correctness in the GPU backend. Fixed conversion of color...

Revert of Progress on gamma-correctness in the GPU backend. Fixed conversion of color and profile type to pix… (patchset #3 id:40001 of https://codereview.chromium.org/1746253002/ )

Reason for revert:
Fixing the build.

Original issue's description:
> Progress on gamma-correctness in the GPU backend. Fixed conversion of color and profile type to pixel config, which makes many things "just work".
>
> Added (color=8888|f16|srgb) option to gpu configurations, along with gpuf16, gpusrgb, and anglesrgb predefined configs. Runs the gpu backend in gamma-correct mode (with either FP16 linear or sRGB 8888 frambuffers).
>
>
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1746253002
>
> Committed: https://skia.googlesource.com/skia/+/eef980270d3385fee340eb1633962fe3ba8b7132

TBR=mtklein@google.com,egdaniel@google.com,bsalomon@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/1748823002