mac80211: Remove a couple of obsolete TODO

mac80211: Remove a couple of obsolete TODO

BugLink: https://bugs.launchpad.net/bugs/1969110
[ Upstream commit cee04f3c3a00ffd2a2a6ed1028e0ab58a3a28d25 ]

The HE capability IE is an extension IE so remove
an irrelevant comments.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20211129152938.550b95b5fca7.Ia31395e880172aefcc0a8c70ed060f84b94bdb83@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit a41efae062bf349d26a1efe4d605a2cbb1c7ebfd)
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>