Move base supports_weight to Issuable

app/models/concerns/issuable.rb

@@ -184,6 +184,10 @@ module Issuable
       assignees.count > 1
     end
 
+    def supports_weight?
+      false
+    end
+
     private
 
     def description_max_length_for_new_records_is_valid

ee/app/models/ee/epic.rb

@@ -240,10 +240,6 @@ module EE
       nil
     end
 
-    def supports_weight?
-      false
-    end
-
     def upcoming?
       start_date&.future?
     end

ee/app/models/ee/merge_request.rb

@@ -124,10 +124,6 @@ module EE
       project.feature_available?(:multiple_merge_request_assignees)
     end
 
-    def supports_weight?
-      false
-    end
-
     def visible_blocking_merge_requests(user)
       Ability.merge_requests_readable_by_user(blocking_merge_requests, user)
     end