remove unused GrTextBlob* from calls

Change-Id: I750bf3103504e3ed12c93e3071950785128f7db5
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/474838
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Herb Derby <herb@google.com>
1 file changed