Remove unnecessary attribute and varying type modifiers

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=5007

Change-Id: Ic9fefe09221d5e367b5aa5dd0084fc7d6631998c
Reviewed-on: https://skia-review.googlesource.com/5007
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
7 files changed