Remove jshint - move everything over to eslint

Also removed all hints of previous linters

js/views/group_update_view.js

@@ -1,3 +1,6 @@
+/* global Backbone, Whisper */
+
+// eslint-disable-next-line func-names
 (function() {
   'use strict';
 
@@ -6,19 +9,19 @@
   Whisper.GroupUpdateView = Backbone.View.extend({
     tagName: 'div',
     className: 'group-update',
-    render: function() {
-      //TODO l10n
+    render() {
+      // TODO l10n
       if (this.model.left) {
-        this.$el.text(this.model.left + ' left the group');
+        this.$el.text(`${this.model.left} left the group`);
         return this;
       }
 
-      var messages = ['Updated the group.'];
+      const messages = ['Updated the group.'];
       if (this.model.name) {
-        messages.push("Title is now '" + this.model.name + "'.");
+        messages.push(`Title is now '${this.model.name}'.`);
       }
       if (this.model.joined) {
-        messages.push(this.model.joined.join(', ') + ' joined the group');
+        messages.push(`${this.model.joined.join(', ')} joined the group`);
       }
 
       this.$el.text(messages.join(' '));