Mixpanel analytics [MAILPOET-686] (#940)

* Send analytics data to mixpanel

[MAILPOET-686]

lib/Config/Initializer.php

@@ -88,7 +88,6 @@ class Initializer {
       $this->setupUpdater();
       $this->setupLocalizer();
       $this->setupMenu();
-      $this->setupAnalytics();
       $this->setupChangelog();
       $this->setupShortcodes();
       $this->setupImages();
@@ -178,11 +177,6 @@ class Initializer {
     $menu->init();
   }
 
-  function setupAnalytics() {
-    $analytics = new Analytics();
-    $analytics->init();
-  }
-
   function setupChangelog() {
     $changelog = new Changelog();
     $changelog->init();