Remove last use of ktx.h

If this breaks something in Google3, revert it.

Change-Id: Id719a87b6ca95c41d06f44f05ee1fdd430d4e0a2
Reviewed-on: https://skia-review.googlesource.com/8262
Commit-Queue: Herb Derby <herb@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
Reviewed-by: Leon Scroggins <scroggo@google.com>
Reviewed-by: Matt Sarett <msarett@google.com>
1 file changed