INT 2F U - NETWORK REDIRECTOR - REMOVE REMOTE DIRECTORY
        AX = 1101h
        SS = DOS DS
        SDA first filename pointer -> fully-qualified directory name
        SDA CDS pointer -> current directory structure for drive with dir
Return: CF set on error
            AX = DOS error code (see INT 21/AH=59h)
        CF clear if successful
Note:   called by DOS 3.1+ kernel
SeeAlso: AX=1105h,INT 21/AH=3Ah,INT 21/AH=60h