wifi: mac80211: remove key data from get_key callback

This is now unused in nl80211, so there's no need to set
the pointer/length.

Reviewed-by: Miriam Rachel Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20240627104411.f8ac49a8cfe0.Ic01f775903f0acd10b9ba77eb39d4ed50e709173@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/cfg.c

@@ -742,9 +742,6 @@ static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
 		break;
 	}
 
-	params.key = key->conf.key;
-	params.key_len = key->conf.keylen;
-
 	callback(cookie, &params);
 	err = 0;