Refactor command class hierarchy to remove an unnecessary intermediate base class Command.

Signed-off-by: Daniel Nephin <dnephin@docker.com>

compose/cli/docopt_command.py

@@ -25,9 +25,6 @@ class DocoptCommand(object):
     def dispatch(self, argv, global_options):
         self.perform_command(*self.parse(argv, global_options))
 
-    def perform_command(self, options, handler, command_options):
-        handler(command_options)
-
     def parse(self, argv, global_options):
         options = docopt_full_help(getdoc(self), argv, **self.docopt_options())
         command = options['COMMAND']