GitLab

Remove dead code. The class previously using this format,
PepperFlashClipboardMessageFilter, has been removed.

Change-Id: If83e3398555ba62eb7c4934c60758e464c6590d8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2511410
Commit-Queue: Victor Costan <pwnall@chromium.org>
Auto-Submit: Darwin Huang <huangdarwin@chromium.org>
Reviewed-by: Victor Costan <pwnall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#822988}