Remove deprecated method `ApplicationBootstrap::setupZendAutoloader()` and its uses

library/Icinga/Application/ApplicationBootstrap.php

@@ -434,17 +434,6 @@ abstract class ApplicationBootstrap
         return $this;
     }
 
-    /**
-     * Register the Zend Autoloader - compat only - does nothing
-     *
-     * @deprecated
-     * @return $this
-     */
-    public function setupZendAutoloader()
-    {
-        return $this;
-    }
-
     /**
      * Setup module manager
      *

library/Icinga/Application/EmbeddedWeb.php

@@ -65,7 +65,6 @@ class EmbeddedWeb extends ApplicationBootstrap
     protected function bootstrap()
     {
         return $this
-            ->setupZendAutoloader()
             ->setupErrorHandling()
             ->loadLibraries()
             ->loadConfig()

library/Icinga/Application/Web.php

@@ -81,7 +81,6 @@ class Web extends EmbeddedWeb
     protected function bootstrap()
     {
         return $this
-            ->setupZendAutoloader()
             ->setupLogging()
             ->setupErrorHandling()
             ->loadLibraries()