remove dead file: PathOpsSkpClipTest.cpp

BUG=skia:

Change-Id: If11dd014b14aa902082f93bf678b9d0f1b2e1c34
Reviewed-on: https://skia-review.googlesource.com/6893
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Mike Klein <mtklein@chromium.org>
4 files changed