wifi: mac80211: remove unneeded scratch_len subtraction

We're always using "scratch + len - pos", so we don't need
to subtract here to calculate the remaining length. Remove
the unnecessary subtraction.
Reviewed-by: Miriam Rachel Korenblit <miriam.rachel.korenblit@intel.com>
Reviewed-by: Ilan Peer <ilan.peer@intel.com>
Link: https://msgid.link/20240228094902.44e07cfa9e63.I7a9758fb9bc6b726aac49804f2f05cd521bc4128@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/parse.c

@@ -862,7 +862,6 @@ ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params)
 					      elems, params->bss,
 					      nontransmitted_profile);
 	elems->scratch_pos += nontransmitted_profile_len;
-	elems->scratch_len -= nontransmitted_profile_len;
 	non_inherit = cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
 					     nontransmitted_profile,
 					     nontransmitted_profile_len);