Remove unnecessary TextureSampler comparison in GrTextureDomainEffect.

The base class already performs this comparison.

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4960

Change-Id: Ic2a46e05f05ba36b291c05e324aa29b4aad15c23
Reviewed-on: https://skia-review.googlesource.com/4960
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
1 file changed