Revert "Reland "Workaround constexpr bug in MSVC 2015 in GrTextureOp""

This reverts commit 16b1eab9bab992785a9c8dd780b42e6ed76a5dc0.

TBR=brianosman@google.com

Change-Id: Ide5128f2d518d9f588c71c3b83cdf051416e71c1
Reviewed-on: https://skia-review.googlesource.com/133420
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
1 file changed