usb: gadget: printer: delete some dead code

"num" is a u16 so it can't go higher than 65535.  kstrtou16() has a
range check built in so this is already handled.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/function/f_printer.c

@@ -1223,11 +1223,6 @@ static ssize_t f_printer_opts_q_len_store(struct f_printer_opts *opts,
 	if (ret)
 		goto end;
 
-	if (num > 65535) {
-		ret = -EINVAL;
-		goto end;
-	}
-
 	opts->q_len = (unsigned)num;
 	ret = len;
 end: