This reverts commit c77032cc74.
The message of the day functionality is still heavily depended on
components of Gerrit core. It is planned to move this functionality
completely to the plugin. Since it was not usable with the new UI for
a long while, the functionality will be removed completely until
then.
Change-Id: I7a426d1814f29b3674283ee22132cee326894470
c9c2762160