Removed unused method

lib/gitlab/ci/status/build/play.rb

@@ -33,10 +33,6 @@ module Gitlab
             'Play'
           end
 
-          def action_class
-            'ci-play-icon'
-          end
-
           def action_path
             play_namespace_project_build_path(subject.project.namespace,
                                               subject.project,

lib/gitlab/ci/status/core.rb

@@ -42,9 +42,6 @@ module Gitlab
           raise NotImplementedError
         end
 
-        def action_class
-        end
-
         def action_path
           raise NotImplementedError
         end