nfc: st21nfca: remove redundant assignment to variable i

Variable i is being assigned a value that is never read, the
assignment is redundant and can be removed. Cleans up clang-scan
build warning:

drivers/nfc/st21nfca/i2c.c:319:4: warning: Value stored to 'i'
is never read [deadcode.DeadStores]
i = 0;

Signed-off-by: Colin Ian King <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/nfc/st21nfca/i2c.c

···
 		skb_pull(skb, 1);
 
 		r = check_crc(skb->data, skb->len);
-		if (r != 0) {
-			i = 0;
+		if (r != 0)
 			return -EBADMSG;
-		}
 
 		/* remove headbyte */
 		skb_pull(skb, 1);