Remove an environment from the configuration.

def remove_env(environment):
    """ Remove an environment from the configuration. """
    if not environment:
        print("You need to supply an environment name")
        return

    parser = read_config()

    if not parser.remove_section(environment):
        print("Unknown environment type '%s'" % environment)
        return

    write_config(parser)

    print("Removed environment '%s'" % environment)