Remove unused macro SK_DONT_DROP_UNNECESSARY_AA_IN_TEXTURE_OP

Change-Id: I7ca3ef6bac15799e8fcb393130b57d247b90de31
Reviewed-on: https://skia-review.googlesource.com/c/159148
Commit-Queue: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
Auto-Submit: Brian Salomon <bsalomon@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
1 file changed