Cleanup, delete unused struct.

Bug: 
Change-Id: I4ea5e81d6d0711d7cf3fdd279f8b0d136bcd6db3
Reviewed-on: https://chromium-review.googlesource.com/846760
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50319}