Delete unused VkClearTest

Bug: skia:
Change-Id: I4aa1886e7f4048fc13a741ddbc37b9ca3f48a41d
Reviewed-on: https://skia-review.googlesource.com/114510
Commit-Queue: Ben Wagner <bungeman@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
2 files changed