diff --git a/gunicorn/app/base.py b/gunicorn/app/base.py
index 59d07060..cb1bd973 100644
--- a/gunicorn/app/base.py
+++ b/gunicorn/app/base.py
@@ -6,7 +6,6 @@ import importlib.util
 import os
 import sys
 import traceback
-import types
 
 from gunicorn import util
 from gunicorn.arbiter import Arbiter