Remove matrixconvolution GM hacks for linear blending

GMs now match betwen gl and glsrgb

Change-Id: Ibc6acf29d93d8bfab81a14be5d794d6e24844324
Reviewed-on: https://skia-review.googlesource.com/140346
Commit-Queue: Brian Osman <brianosman@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
Auto-Submit: Brian Osman <brianosman@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
1 file changed