rm skcms_PolyTF and skcms_OptimizeForSpeed()

This just gets them out of our faces so we can focus on getting
everything landed and correct, and then circle back around to speed.

Change-Id: Iedade5296c2f92dc43e4abff0af88e412cea437b
Reviewed-on: https://skia-review.googlesource.com/128928
Auto-Submit: Mike Klein <mtklein@chromium.org>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
28 files changed