Remove obsolete checks about colorType and colorSpace

Also remove the unit tests that were enforcing those rules,
and the blacklist of that unit test.

Bug: skia:
Change-Id: I802c9e81a412fe0b19d02f9224b801f4fbd901f2
Reviewed-on: https://skia-review.googlesource.com/c/161562
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: Brian Osman <brianosman@google.com>
5 files changed