From the NannyMUD documentation

LAST CHANGE

2001-01-29

FUNCTION

NAME
        rmdir - Remove a directory.


SYNTAX
	rmdir 

DESCRIPTION
	The directory 'dir' will be removed. Path expansion is done on 'dir'
	but if a single name is given it is assumed to be a directory in the
	current directory.


NOTE
	Non-empty directories will not be removed.
	Not everyone can remove anything everywhere in the file system.