Remove dep from ktx to SkTextureCompressor.

If this breaks anything in google3 revert it.

Change-Id: I35eb588e753a6fad78c1255556daae145533c801
Reviewed-on: https://skia-review.googlesource.com/8275
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Herb Derby <herb@google.com>
2 files changed