Revert unused method parameter

lib/plugins/acts_as_watchable/lib/acts_as_watchable.rb

@@ -49,7 +49,7 @@ module Redmine
           send :include, Redmine::Acts::Watchable::InstanceMethods
           alias_method_chain :watcher_user_ids=, :uniq_ids
 
-          OpenProject::Acts::Watchable::Routes.add_watched(self, options[:route_prefix])
+          OpenProject::Acts::Watchable::Routes.add_watched(options[:route_prefix] || self.to_s.underscore.pluralize)
         end
       end
 

lib/plugins/acts_as_watchable/lib/acts_as_watchable/routes.rb

@@ -22,12 +22,12 @@ module OpenProject
           /\d+/.match(params[:object_id])
         end
 
-        def self.add_watched(watched, options = nil)
+        def self.add_watched(watched)
           objects_base_klass = get_objects_base_class watched
 
           self.models ||= []
 
-          self.models << ((options.nil?) ? watched.to_s : options)
+          self.models << ((objects_base_klass.nil?) ? watched.to_s : objects_base_klass.to_s)
         end
 
         private