Clean up favicons class that is no longer used

This class seems to no longer be used. CreateUrlListItem() method, which initiates the types of views
this class seem to have been used for, seems to never set an icon, just an id, and an url.

Change-Id: I105bb4d674df70d04e83f592ae31b2422379bfbb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1651733
Reviewed-by: Michael Wasserman <msw@chromium.org>
Reviewed-by: Balazs Engedy <engedy@chromium.org>
Commit-Queue: Kamila Hasanbega <hkamila@google.com>
Cr-Commit-Position: refs/heads/master@{#670420}
2 files changed