Remove legacy code from airbreaker

Which part would be affected

None : this legacy code is intended for a GH version which doesn't exist anymore All functionnality in current public build should be enough to provide better functionality

Description of the feature

A subpart of #42 (closed) : once airbreaker will be updated, there will remain fallback code intended for a time where aircrack wasn't available

How would it enhance the experience?

Clearer and smaller code, reducing the character count

Checks to do

None : the script can't work until #42 (closed) is completed, as it's still using pre-merge code