Delete glCaps.detachStencilFromMSAABuffersBeforeReadPixels

Now that we have a non-msaa FBO on Adreno chips this workaround is no
longer necessary.

Bug: skia:11396
Bug: skia:11838
Change-Id: Ibd3386dcbcbefcf9506a07bbd095ee9431552d2a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/393718
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
3 files changed