Bug 1498914 - Removal of Pocket icon from address bar persist across a restart r=adw

Differential Revision: https://phabricator.services.mozilla.com/D8889

--HG--
extra : moz-landing-system : lando

browser/components/pocket/content/SaveToPocket.jsm

@@ -528,9 +528,6 @@ var SaveToPocket = {
   },
 
   uninit() {
-    // For speed sake, we should only do a shutdown if we're being disabled.
-    // On an app shutdown, just let it fade away...
     Services.prefs.removeObserver("extensions.pocket.enabled", prefObserver);
-    PocketOverlay.shutdown();
   },
 };