iwd: remove 8021X "unknown network" restrictions

Removing these restrictions gets 8021X networks (WPA-Enterprise +
PEAP/MsCHAPv2) working on the Steam Deck.

So the inline comments are not 100% correct and the restrictions seem
dubious. Drop them.

 - Indent properly, drop no longer used variables and functions

 - More indentation polish, to keep the CI happy

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
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