Revert "Add kRGBX_8888, kRGBA_1010102, and kRGBX_1010102 color types. Unused for now."

This reverts commit 528018f579c3647a5acd6a27e83c47192ea65baf.

Reason for revert: Breaks branch build w/out corresponding Chrome change.

Original change's description:
> Add kRGBX_8888, kRGBA_1010102, and kRGBX_1010102 color types. Unused for now.
> 
> BUG= skia:7533
> 
> Cherry pick to M65
> BUG = chromium:779428
> 
> No-Tree-Checks: true
> No-Try: true
> No-Presubmit: true
> Change-Id: I4b3f6b827fd833ba2d07895884d2abc9a3132366
> Reviewed-On: https://skia-review.googlesource.com/99781
> Reviewed-By: Mike Klein <mtklein@chromium.org>
> Commit-Queue: Brian Salomon <bsalomon@google.com>
> Reviewed-on: https://skia-review.googlesource.com/103200
> Reviewed-by: Brian Salomon <bsalomon@google.com>

TBR=mtklein@chromium.org,bsalomon@google.com

Change-Id: I3a8fc24ae48519b1da21e54c5e85899e8577f288
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:7533
Reviewed-on: https://skia-review.googlesource.com/103300
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
9 files changed