Revert "Add unit test for clear bug"

This reverts commit 2fb81c04d74973181208f4f33eb6be4d4bae0321.

Reason for revert: Apparently no gpu can consistently perform a full screen clear

Original change's description:
> Add unit test for clear bug
> 
> Bug: 768134
> Change-Id: Ifb5a0eaeb85a8f399204467c22d0845d630d0d3d
> Reviewed-on: https://skia-review.googlesource.com/60562
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Robert Phillips <robertphillips@google.com>

TBR=bsalomon@google.com,robertphillips@google.com

Change-Id: I88434e55e5391e858ee7c37873d74d71f0c5b69f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 768134
Reviewed-on: https://skia-review.googlesource.com/60684
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
1 file changed