iwlegacy: remove redundant initialization of variable tid

The variable tid is being initialized with a value that is never read
and it is being updated later with a new value.  The initialization is
redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200701135221.549700-1-colin.king@canonical.com

drivers/net/wireless/intel/iwlegacy/4965-rs.c

@@ -1749,7 +1749,7 @@ il4965_rs_rate_scale_perform(struct il_priv *il, struct sk_buff *skb,
 	u8 done_search = 0;
 	u16 high_low;
 	s32 sr;
-	u8 tid = MAX_TID_COUNT;
+	u8 tid;
 	struct il_tid_data *tid_data;
 
 	D_RATE("rate scale calculate new rate for skb\n");