Revert "Wifi: Add frequency selection for new IBSS"

This reverts commit fbed3c35613f804e71b6fae247aec4c9cdd0fda2.
Revert "Wifi: Enable IBSS options only if IBSS is supported"

This reverts commit fb7bf926d2eeab90262a8093ef6287433bb70741.
Revert "Wifi: Allow configuration of Ad-Hoc (IBSS) networks"

This reverts commit 8a563ca50dc060e8f025d9c70473e372f4f4fe0a.