* WIP: Adds a Users::RemoveRole service to encapsulate Admin::UsersController#destroy
* Adds #role_display_name helper to application_helper.rb for extensibility
* Adjusts Member is Suspended banner to Member is Banned for consistency
* WIP: Extract Admin::UsersController#destroy into remove_role.rb service
* Cleans up Admin::UsersController#destroy and remove_role.rb service
- Removes unneccessary code from Admin::UsersController#destroy
- Replaces args with keyword args in Admin::UsersController#destroy
- Replaces args with keyword args in remove_role.rb service
- Refactors code to be more extensible and cleaner overall
* Adds a remove_role_spec.rb to test Users::RemoveRole service
* Fix typo in Admin::UsersController#destroy
* Refactors role_display_name helper method and reverts change to banner
* Use #role_display_name in _current_roles.html.erb
* Refactors conditional, names, and adjusts spec to account for refactors
* Raises StandardError if there is an issue with role removal
