Remove unused PPB_Flash_DRM:1.0 and PPB_Flash_DeviceID interfaces.

These interfaces have not been used by Flash for a long time now.

Change-Id: I53116e30145d7f322d2e27960b7b507691e75694
Reviewed-on: https://chromium-review.googlesource.com/1162585
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Reviewed-by: Raymes Khoury <raymes@chromium.org>
Commit-Queue: Wez <wez@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#584765}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: c0debd58673884410ee6ccea27b8e27ab11f182e
15 files changed