Removed unused useCache param in GrYUVProvider

The function was only ever called in one spot and always passed in true
for this value.

Bug: skia:
Change-Id: Ie22c01d13da5e34664cb67b7b1c900da6d92bb45
Reviewed-on: https://skia-review.googlesource.com/90402
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
3 files changed