Remove redundant caps field from GrProcessorTestData

Change-Id: Ic31338f08d1bd5b55ffab75d30c0f54436c8b917
Reviewed-on: https://skia-review.googlesource.com/7510
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
4 files changed