Remove obsolete comment

Bug: skia:
Change-Id: I4a290e643275c4e41e7f42496ffc14a9a1abca82
TBR: reed@google.com, mtklein@google.com, herb@google.com
Reviewed-on: https://skia-review.googlesource.com/120560
Reviewed-by: Yuqian Li <liyuqian@google.com>
Commit-Queue: Yuqian Li <liyuqian@google.com>
1 file changed