clean up option for old powf()

Change-Id: I68f4d4faea150ba08618ad0feb9db90e2854b012
Reviewed-on: https://skia-review.googlesource.com/132091
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: Mike Klein <mtklein@chromium.org>
Reviewed-by: Brian Osman <brianosman@google.com>
2 files changed