We now have 20 questions with the airliner tag.
Looking through them, there are very few, if any, that actually need it.
Most of them are either generic large/transport category airplane questions (because there are Boeing and Airbus airplanes that are private too) or generic questions that apply to all jet aircraft or all pressurized aircraft.
There are a few that apply only to the airlines (and not specifically airliners), but those can be tagged airline-operations.
I propose that we retag the existing questions appropriately and remove the tag altogether unless someone finds questions that it is actually relevant for.