remove login and user auth from the web ui

On several occasions while testing the agent on different systems and with the master deployed alongside I ran into issues while trying to get the web ui started with regards to the requirement of having an initial admin user.  

Rather than try to repair this problem for a third time I've opted to remove these parts of the code instead especially since it's currently incomplete, insecure, and will more than likely be revisited again in the future anyway (and probably completely rewritten).

This change only affects the code within the web ui.  It does not remove the underlying User and Role tables yet or some of the internal code which performs authentication, that will be part of a separate pull request because the changes for that are more involved.