Revert "Preserve pixel config in makeColorSpace of GPU backed images"

This reverts commit 2f90741541b69aa0bc428490d804d426210512f4.

Reason for revert: Speculative fix for Chrome roll.

Original change's description:
> Preserve pixel config in makeColorSpace of GPU backed images
> 
> Bug: skia:
> Change-Id: I3d0ad479b6bdc9b2f2738291f80ab50ff41eba15
> Reviewed-on: https://skia-review.googlesource.com/c/162037
> Commit-Queue: Brian Osman <brianosman@google.com>
> Commit-Queue: Mike Klein <mtklein@google.com>
> Auto-Submit: Brian Osman <brianosman@google.com>
> Reviewed-by: Mike Klein <mtklein@google.com>

TBR=mtklein@google.com,bsalomon@google.com,brianosman@google.com

Change-Id: Id01cffd0e5a559b98b9fd7111b437a4e343ac21d
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/c/162361
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
1 file changed