NAME
	m_delete - delete an index from a mapping

SYNSOPSIS
	 mapping m_delete(mapping map, mixed index)

DESCRIPTION
	Remove the entry with index 'index' from mapping 'map', and
	return the changed mapping. If the mapping does not have an
	entry with index 'index', the first argument is returned.

SEE ALSO
	mappingp, mkmapping, m_indices, m_values, m_sizeof