Delete some LUTs from SkColorSpaceXform

No need to keep these around.  In the rare case that these are
needed, we can just go ahead and build them.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2326043002

Review-Url: https://codereview.chromium.org/2326043002
2 files changed