Update to Drupal 8.0.0 beta 14. For more information, see https://drupal.org/node/2544542

core/vendor/symfony/dependency-injection/ParameterBag/FrozenParameterBag.php

@@ -69,4 +69,14 @@ class FrozenParameterBag extends ParameterBag
     {
         throw new LogicException('Impossible to call set() on a frozen ParameterBag.');
     }
+
+    /**
+     * {@inheritdoc}
+     *
+     * @api
+     */
+    public function remove($name)
+    {
+        throw new LogicException('Impossible to call remove() on a frozen ParameterBag.');
+    }
 }