lets think about this clearly.....
you have an aircraft at risk of crashing, and you want to improve the surviveability of the crash by removing the aircrafts wings?
Thats real brain-fart logic.
Only way thats going to work is if you have a second set of booster engines which can carry the cabin to altitude clear of the rest of the aircraft, and then have a secondary collapsing wing which can handle the stresses of the emergency acceleration - and deploy in fractions of a second. No chance given modern technology
Only thing which might be of value could be the ability to jettison a burning engine, leaving the rest of the aircraft intact - but I expect in reality even that would be of minimal use