You can uninstall or removes an installed nova-ajax-console-proxy package itself from Ubuntu 14.04 LTS (Trusty Tahr) through the terminal,
$ sudo apt-get remove nova-ajax-console-proxy
If you would like to remove nova-ajax-console-proxy and it's dependent packages which are no longer needed from Ubuntu,
$ sudo apt-get remove --auto-remove nova-ajax-console-proxy
If you use with purge options to nova-ajax-console-proxy package all the configuration and dependent packages will be removed.
$ sudo apt-get purge nova-ajax-console-proxy
If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.
$ sudo apt-get purge --auto-remove nova-ajax-console-proxy