Remove channel id from Clear-Site-Data

Clear-Site-Data was still trying to delete channel ids, which lead
to a failed DCHECK because channel ids were removed from
FILERABLE_DATATYPES.

Bug: 875053
Change-Id: I23db6a3f763b19523ca17206c546265247f7e35d
Reviewed-on: https://chromium-review.googlesource.com/c/1370167
Reviewed-by: Martin Šrámek <msramek@chromium.org>
Commit-Queue: Christian Dullweber <dullweber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#615134}
2 files changed