Remove unused imports

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

gunicorn/reloader.py

@@ -5,7 +5,6 @@
 
 import os
 import re
-import signal
 import sys
 import time
 import threading

gunicorn/workers/base.py

@@ -7,7 +7,6 @@ from datetime import datetime
 import os
 import signal
 import sys
-import traceback
 
 
 from gunicorn import util