staging: gdm724x: remove redundant assignment of pointer w

Pointer w is being assigned a value that is never read, it is
being re-assigned a new value later. The assignment is redundant
and can be removed.

Cleans up clan scan build warning:
drivers/staging/gdm724x/gdm_lte.c:198:2: warning: Value stored to 'w'
is never read [deadcode.DeadStores]
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20220307144603.136846-1-colin.i.king@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/gdm724x/gdm_lte.c

@@ -195,7 +195,6 @@ static __sum16 icmp6_checksum(struct ipv6hdr *ipv6, u16 *ptr, int len)
 	pseudo_header.ph.ph_len = be16_to_cpu(ipv6->payload_len);
 	pseudo_header.ph.ph_nxt = ipv6->nexthdr;
 
-	w = (u16 *)&pseudo_header;
 	for (i = 0; i < ARRAY_SIZE(pseudo_header.pa); i++) {
 		pa = pseudo_header.pa[i];
 		sum = csum_add(sum, csum_unfold((__force __sum16)pa));