[DI] Whitelist error_renderer.renderer tag in UnusedTagsPass

Author: chalasr

DependencyInjection/Compiler/UnusedTagsPass.php

@@ -32,6 +32,7 @@ class UnusedTagsPass implements CompilerPassInterface
         'controller.service_arguments',
         'config_cache.resource_checker',
         'data_collector',
+        'error_renderer.renderer',
         'form.type',
         'form.type_extension',
         'form.type_guesser',