remove uncalled virtuals

Change-Id: Icd2e7ec8f321a1828b317d74c0ce4f3ada971e0a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/276765
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Mike Reed <reed@google.com>
1 file changed