Fix coding standards error.

src/Shell/Task/ModelTask.php

@@ -650,7 +650,7 @@ public function bakeTable($model, array $data = []) {
 		// Work around composer caching that classes/files do not exist.
 		// Check for the file as it might not exist in tests.
 		if (file_exists($filename)) {
-			require_once ($filename);
+			require_once $filename;
 		}
 		TableRegistry::clear();