remove redundant override

Author: srawlins

lib/src/model/inheriting_container.dart

@@ -229,7 +229,6 @@ abstract class InheritingContainer extends Container {
   InheritingContainer get definingContainer =>
       getModelFor(element, library) as InheritingContainer;
 
-  @override
   @override
   InterfaceElement2 get element;