Deletes a directory. The directory is deleted only if it is empty.
call "CBL_DELETE_DIR" using      pathname
                      returning status-code 
               	 | pathname | pic x(n). | 
| status-code | See Library Routines - Key | 
| pathname | Relative or absolute pathname, or a specific MFDBFH datastore URL(see The Datastore URL for specific SQL URL syntax), terminated by space or null (x"00"). | 
None.