Remove unneeded sk_bzero

Change-Id: Id06ca338b7ff041775b94a9c557c6fc8a297a48f
Reviewed-on: https://skia-review.googlesource.com/c/165684
Auto-Submit: Herb Derby <herb@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
2 files changed