USB: core: remove dead code in do_proc_bulk()

Since len1 is unsigned int, len1 < 0 always false. Remove it keep code
simple.

Signed-off-by: Rex Nie <[e-mail]>
Rule: add
Link: https://lore.kernel.org/stable/20241108094255.2133-1-rex.nie%40jaguarmicro.com
Acked-by: Alan Stern <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/core/devio.c

···
 		return ret;
 
 	len1 = bulk->len;
-	if (len1 < 0 || len1 >= (INT_MAX - sizeof(struct urb)))
+	if (len1 >= (INT_MAX - sizeof(struct urb)))
 		return -EINVAL;
 
 	if (bulk->ep & USB_DIR_IN)