Now that we have the GrContext setBackendTextureState calls we no longer
need these to be on flush.
Bug: skia:10254
Change-Id: I7c44667a327de11dd853e3e71b114959a7bcee86
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/295447
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>