HID: uclogic: remove redudant duplicated null check on ver_ptr

Currently ver_ptr is being null checked twice, once before calling
usb_string and once afterwards.  The second null check is redundant
and can be removed, remove it.

Detected by CoverityScan, CID#1477308 ("Logically dead code")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>

drivers/hid/hid-uclogic-params.c

@@ -735,10 +735,6 @@ static int uclogic_params_huion_init(struct uclogic_params *params,
 		goto cleanup;
 	}
 	rc = usb_string(udev, 201, ver_ptr, ver_len);
-	if (ver_ptr == NULL) {
-		rc = -ENOMEM;
-		goto cleanup;
-	}
 	if (rc == -EPIPE) {
 		*ver_ptr = '\0';
 	} else if (rc < 0) {