Simply shutdown logging instead of cleaning up

src/pip/_internal/basecommand.py

@@ -137,8 +137,6 @@ class Command(object):
                 )
                 sys.exit(VIRTUALENV_NOT_FOUND)
 
-        original_root_handlers = set(logging.root.handlers)
-
         try:
             status = self.run(options, args)
             # FIXME: all commands should return an exit status
@@ -178,10 +176,9 @@ class Command(object):
                         retries=0,
                         timeout=min(5, options.timeout)) as session:
                     pip_version_check(session, options)
-            # Avoid leaking loggers
-            for handler in set(logging.root.handlers) - original_root_handlers:
-                # this method benefit from the Logger class internal lock
-                logging.root.removeHandler(handler)
+
+            # Shutdown the logging module
+            logging.shutdown()
 
         return SUCCESS