remove dead flag

no client still defines this

Bug: skia:
Change-Id: If55dade4207108241bbb1e3d6f7515ad12d36acc
Reviewed-on: https://skia-review.googlesource.com/59083
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
1 file changed