Issue #2725441 by tstoeckler:...

Issue #2725441 by tstoeckler: \Drupal\simpletest\ContentTypeCreationTrait::createContentType() needlessly rebuilds the router

core/modules/simpletest/src/ContentTypeCreationTrait.php

@@ -39,7 +39,6 @@ protected function createContentType(array $values = array()) {
     $type = NodeType::create($values);
     $status = $type->save();
     node_add_body_field($type);
-    \Drupal::service('router.builder')->rebuild();
 
     if ($this instanceof \PHPUnit_Framework_TestCase) {
       $this->assertSame($status, SAVED_NEW, (new FormattableMarkup('Created content type %type.', array('%type' => $type->id())))->__toString());