diff --git a/gunicorn/config.py b/gunicorn/config.py
index a739deb4..6cadd09b 100644
--- a/gunicorn/config.py
+++ b/gunicorn/config.py
@@ -15,7 +15,6 @@ import pwd
 import ssl
 import sys
 import textwrap
-import types
 
 from gunicorn import __version__
 from gunicorn.errors import ConfigError
diff --git a/gunicorn/reloader.py b/gunicorn/reloader.py
index 4333ef7f..219ffa83 100644
--- a/gunicorn/reloader.py
+++ b/gunicorn/reloader.py
@@ -5,7 +5,6 @@
 
 import os
 import re
-import signal
 import sys
 import time
 import threading
diff --git a/gunicorn/workers/base.py b/gunicorn/workers/base.py
index d2b07090..5be83efd 100644
--- a/gunicorn/workers/base.py
+++ b/gunicorn/workers/base.py
@@ -7,7 +7,6 @@ from datetime import datetime
 import os
 import signal
 import sys
-import traceback
 
 
 from gunicorn import util