Revert of Add control of manual mipmapping to GrContextOptions (patchset #2 id:20001...

Revert of Add control of manual mipmapping to GrContextOptions (patchset #2 id:20001 of https://codereview.chromium.org/2054623003/ )

Reason for revert:
https://build.chromium.org/p/client.skia/builders/Test-Ubuntu-GCC-Golo-GPU-GT610-x86_64-Debug-ASAN/builds/3481/steps/test_skia%20on%20Ubuntu/logs/stdio

../../../src/gpu/gl/GrGLCaps.cpp:554:25: runtime error: load of value 187, which is not a valid value for type 'bool'
SUMMARY: AddressSanitizer: undefined-behavior ../../../src/gpu/gl/GrGLCaps.cpp:554:25 in
step returned non-zero exit code: 1

Original issue's description:
> Add control of manual mipmapping to GrContextOptions
>
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2054623003
>
> Committed: https://skia.googlesource.com/skia/+/97e398d98928f9497063594ebe633efe2d0f4968

TBR=bsalomon@google.com,brianosman@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/2050373002