Remove concerns from eager load paths

config/application.rb

@@ -41,11 +41,6 @@ module Gitlab
                                      #{config.root}/app/models/hooks
                                      #{config.root}/app/models/members
                                      #{config.root}/app/models/project_services
-                                     #{config.root}/app/workers/concerns
-                                     #{config.root}/app/policies/concerns
-                                     #{config.root}/app/services/concerns
-                                     #{config.root}/app/serializers/concerns
-                                     #{config.root}/app/finders/concerns
                                      #{config.root}/app/graphql/resolvers/concerns
                                      #{config.root}/app/graphql/mutations/concerns])