Remove dead code

This view doesn't contain any elements with class openInbox.

// FREEBIE

js/views/conversation_view.js

@@ -183,7 +183,6 @@
             'click .show-identity': 'showSafetyNumber',
             'click .show-members': 'showMembers',
             'click .conversation-menu .hamburger': 'toggleMenu',
-            'click .openInbox' : 'openInbox',
             'click' : 'onClick',
             'click .bottom-bar': 'focusMessageField',
             'click .back': 'resetPanel',
@@ -652,10 +651,6 @@
             this.model.messageCollection.add(message, {merge: true});
         },
 
-        openInbox: function() {
-            openInbox();
-        },
-
         onClick: function(e) {
             // If there are sub-panels open, we don't want to respond to clicks
             if (!this.panels || !this.panels.length) {