Remove unused SkpSkGrTest.cpp

Doesn't look like this is used or even built anymore. If we ever find a
future use for it we can add it back.

Bug: skia:
Change-Id: I736df90d984756b2dd14d95e8e5b4f3ec72ce8f7
Reviewed-on: https://skia-review.googlesource.com/105602
Reviewed-by: Cary Clark <caryclark@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
2 files changed