Drop Pulp 2 Smart Proxy status code

These were likely not triggered anymore because the Pulp 2 features were
never present.

Author: ekohl

app/controllers/katello/concerns/smart_proxies_controller_extensions.rb

@@ -189,15 +189,12 @@ class Engine < ::Rails::Engine
       require_dependency "#{Katello::Engine.root}/app/lib/katello/api/v2/rendering"
       require_dependency "#{Katello::Engine.root}/app/controllers/katello/api/api_controller"
       require_dependency "#{Katello::Engine.root}/app/controllers/katello/api/v2/api_controller"
-      require_dependency "#{Katello::Engine.root}/app/services/katello/proxy_status/pulp"
-      require_dependency "#{Katello::Engine.root}/app/services/katello/proxy_status/pulp_node"
 
       #Api controller extensions
       ::Api::V2::HostsController.include Katello::Concerns::Api::V2::HostsControllerExtensions
       ::Api::V2::HostsController.include Katello::Concerns::ContentFacetHostsControllerExtensions
       ::Api::V2::HostsBulkActionsController.include Katello::Concerns::Api::V2::HostsBulkActionsControllerExtensions
       ::Api::V2::HostgroupsController.include Katello::Concerns::Api::V2::HostgroupsControllerExtensions
-      ::Api::V2::SmartProxiesController.include Katello::Concerns::Api::V2::SmartProxiesControllerExtensions
       ::Api::V2::RegistrationController.include ::Foreman::Controller::SmartProxyAuth
       ::Api::V2::RegistrationController.prepend Katello::Concerns::Api::V2::RegistrationControllerExtensions
       ::Api::V2::RegistrationCommandsController.include Katello::Concerns::Api::V2::RegistrationCommandsControllerExtensions