fix warning: remove assigned to variable

variable is subsequently not used

Change-Id: I177d21c6ba9f1f2e3765feffdbf317ea375a8cfe
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
Reviewed-on: http://openocd.zylin.com/149
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>

src/flash/nor/pic32mx.c

@@ -724,7 +724,7 @@ static int pic32mx_info(struct flash_bank *bank, char *buf, int buf_size)
 
 	buf += printed;
 	buf_size -= printed;
-	printed = snprintf(buf, buf_size, " Ver: 0x%02x",
+	snprintf(buf, buf_size, " Ver: 0x%02x",
 			(unsigned)((device_id >> 28) & 0xf));
 
 	return ERROR_OK;