ataflop: Killl warning about unused variable flags

After commit e0c09786 ("ataflop: remove
buggy/commented-out IRQ disable from do_fd_request()") the `flags' variable
became unused:

drivers/block/ataflop.c:1473: warning: unused variable 'flags'

Hence remove it.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

drivers/block/ataflop.c

@@ -1470,8 +1470,6 @@ repeat:
 
 void do_fd_request(struct request_queue * q)
 {
- 	unsigned long flags;
-
 	DPRINT(("do_fd_request for pid %d\n",current->pid));
 	while( fdc_busy ) sleep_on( &fdc_wait );
 	fdc_busy = 1;