1) it doesn't supply any information not supplied by the new
"wlan_radio" tap and, in fact, supplies less information (including not
supplying any presence flags);

2) it only works for radiotap headers, not for any other forms of radio
metadata;

3) its data structure wasn't declared in a header available to any
listeners, it was defined internally to the radiotap dissector.

Change-Id: Ie84a48bbf204b8b3bb40370c17ca82d39e5df3fb
Reviewed-on: https://code.wireshark.org/review/30415


Reviewed-by: Guy Harris <guy@alum.mit.edu>