diff --git a/parso/grammar.py b/parso/grammar.py
index 27d6002..af4e3b6 100644
--- a/parso/grammar.py
+++ b/parso/grammar.py
@@ -1,6 +1,5 @@
 import hashlib
 import os
-import warnings
 from typing import Generic, TypeVar, Union, Dict, Optional, Any
 from pathlib import Path