remove deprecated concat44 -- use concat

Change-Id: I769a4148b29ef90ffc5f9944013ea2c131146f75
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/281861
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
1 file changed