[MMC] Remove unused timer.

Remove timer that was left from earlier cleanup.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

drivers/mmc/wbsd.h

@@ -184,6 +184,5 @@ struct wbsd_host
 	struct tasklet_struct	finish_tasklet;
 	struct tasklet_struct	block_tasklet;
 
-	struct timer_list	detect_timer;	/* Card detection timer */
 	struct timer_list	ignore_timer;	/* Ignore detection timer */
 };