Revert "Print usage when argv empty"

This reverts commit fab8c8ba1c.

docker_custodian/docker_autostop.py

@@ -95,10 +95,6 @@ def get_opts(args=None):
     )
     opts = parser.parse_args(args=args)
 
-    if len(sys.argv) < 2:
-        parser.print_help()
-        exit(0)
-
     if not opts.prefix:
         parser.error("Running with no --prefix will match nothing.")
 

docker_custodian/docker_gc.py

@@ -269,10 +269,6 @@ def get_args(args=None):
         help="Path to a file which contains a list of images to exclude, one "
              "image tag per line.")
 
-    if len(sys.argv) < 2:
-        parser.print_help()
-        exit(0)
-
     return parser.parse_args(args=args)