detach -> detached

Change-Id: I05acb0a65ad3942bbd1f7943e52747c841e4afa4
diff --git a/polygerrit-ui/app/elements/settings/gr-settings-view/gr-settings-view.js b/polygerrit-ui/app/elements/settings/gr-settings-view/gr-settings-view.js
index 4984fd4..7f0a754 100644
--- a/polygerrit-ui/app/elements/settings/gr-settings-view/gr-settings-view.js
+++ b/polygerrit-ui/app/elements/settings/gr-settings-view/gr-settings-view.js
@@ -224,7 +224,7 @@
       });
     },
 
-    detach() {
+    detached() {
       this.unlisten(window, 'location-change', '_handleLocationChange');
     },