Code cleanup: update obsolete comment, remove macro.

Change-Id: Ia0bc034a9360c03d74d97923f4a963aaa09fb58e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/360577
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
3 files changed