style(transcluding_component_factory): remove duplicate line from merge resolution

Author: chirayuk

lib/core_dom/transcluding_component_factory.dart

@@ -153,7 +153,6 @@ class BoundTranscludingComponentFactory implements BoundComponentFactory {
 
       var controller = childInjector.getByKey(_ref.typeKey);
       shadowScope.context[component.publishAs] = controller;
-      shadowScope.context[component.publishAs] = controller;
       if (controller is ScopeAware) controller.scope = shadowScope;
       BoundComponentFactory._setupOnShadowDomAttach(controller, templateLoader, shadowScope);
       return controller;