INT 14 - TelAPI - "telunload" - UNINSTALL
	AH = E6h
Return: AX = status
	    0000h successful
	    FFFFh unable to uninstall
Notes:	TelAPI also supports the NASI/NACS and NCSI APIs on INT 6B
	this function invokes AH=E5h internally
SeeAlso: AH=E5h,AX=FF00h,INT 6B/AH=00h,INT 6B/AH=10h