MD WebUI: Simplify cr-shared-menu exit animation

ui/webui/resources/cr_elements/cr_shared_menu/cr_shared_menu.js

Index: ui/webui/resources/cr_elements/cr_shared_menu/cr_shared_menu.js
diff --git a/ui/webui/resources/cr_elements/cr_shared_menu/cr_shared_menu.js b/ui/webui/resources/cr_elements/cr_shared_menu/cr_shared_menu.js
index 88ca053214835179c919a3d519545c03fd35f485..0229a7ce45ea201536c52ad1b340c994261cd028 100644
--- a/ui/webui/resources/cr_elements/cr_shared_menu/cr_shared_menu.js
+++ b/ui/webui/resources/cr_elements/cr_shared_menu/cr_shared_menu.js
@@ -70,19 +70,6 @@ Polymer({
           timing: {
             duration: 150
           }
-        }, {
-          name: 'paper-menu-shrink-width-animation',
-          timing: {
-            delay: 100,
-            duration: 50,
-            easing: SLIDE_CUBIC_BEZIER
-          }
-        }, {
-          name: 'paper-menu-shrink-height-animation',
-          timing: {
-            delay: 200,
-            easing: 'ease-in'
-          }
         }];
       }
     }