Update md.asm

Remove cache'ng of flash routine . didn't work hxb_buf must be getting trashed by other processes.

Source/HBIOS/md.asm

@@ -472,7 +472,6 @@ MD_SECM1:				; DESIRED SECTOR IS IN BUFFER
 ;
 MD_LBA4K	.DW	$FFFF		; LBA OF CURRENT SECTOR
 MD_FBAS		.DW	$FFFF		; BANK AND SECTOR
-;MD_FLOP		.DW	$FFFF		; ADDRESS OF LAST OPERATION CALLED
 #ENDIF
 ;
 ; READ RAM / ROM 
@@ -837,22 +836,12 @@ FF_NXT2:
 ;
 MD_FNCALL:				; USING HBX_BUF FOR CODE AREA
 ;
-;	EX	DE,HL			; IF WE ARE 
-;	LD	HL,(MD_FLOP)		; REPEATING THE
-;	XOR	A			; SAME OPERATION
-;	SBC	HL,DE			; AS PREVIOUS
-;	EX	DE,HL			; DONT COPY
-;	JR	Z,MD_FSAME		; IF THE SAME, DE=0
-;	LD	(MD_FLOP),HL		; SAVE CURRENT OPERATION FOR NEXT TIME
-
 	LD	DE,HBX_BUF		; EXECUTE / START ADDRESS
 	LD	BC,MD_CSIZE		; CODE SIZE. MAXIMUM 64 BYTES
 	LDIR				; COPY OUR RELOCATABLE CODE TO THE BUFFER
 ;
 	LD	D,B			; PRESET DE TO ZERO TO REDUCE
 	LD	E,B			; CODE SIZE IN RELOCATABLE CODE
-;
-;MD_FSAME:
 ;
 	LD	BC,(MD_FBAS)		; PUT BANK AND SECTOR DATA IN BC
 ;