Staging: hv: remove UNUSED_VAR usage

This isn't needed at all.

Cc: Hank Janssen <hjanssen@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/hv/include/osd.h

@@ -30,8 +30,6 @@
 //
 
 
-#define UNUSED_VAR(v)		v  __attribute__((__unused__))
-
 #define ALIGN_UP(value, align)			( ((value) & (align-1))? ( ((value) + (align-1)) & ~(align-1) ): (value) )
 #define ALIGN_DOWN(value, align)		( (value) & ~(align-1) )
 #define NUM_PAGES_SPANNED(addr, len)	( (ALIGN_UP(addr+len, PAGE_SIZE) - ALIGN_DOWN(addr, PAGE_SIZE)) >> PAGE_SHIFT )

drivers/staging/hv/netvsc_drv.c

@@ -154,7 +154,7 @@ Desc:	Set the multicast list
 
 Remark:	No-op here
 --*/
-static void netvsc_set_multicast_list(UNUSED_VAR(struct net_device *net))
+static void netvsc_set_multicast_list(struct net_device *net)
 {
 }