thermal: core: remove redundant initialization of variable ret

The variable ret 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: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20200706140747.489075-1-colin.king@canonical.com

drivers/thermal/thermal_netlink.c

@@ -546,7 +546,7 @@ static int thermal_genl_cmd_dumpit(struct sk_buff *skb,
 	struct param p = { .msg = skb };
 	const struct genl_dumpit_info *info = genl_dumpit_info(cb);
 	int cmd = info->ops->cmd;
-	int ret = -EMSGSIZE;
+	int ret;
 	void *hdr;
 
 	hdr = genlmsg_put(skb, 0, 0, &thermal_gnl_family, 0, cmd);