Remove all skpbench jobs

Change-Id: I0de866fa13df1943959d255ff69d4ab57411478f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/864956
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
2 files changed