Urban Combat cards - remove Air Bombardment and Armor Factory?

I recently got myself Sword of Stalingrad and New Flight Plan. After going through the NFP rules and the Urban Combat deck, two cards stand out:

  • Armor Factory seems to be specific to SoS maps. Should I remove this card when playing other maps?
  • Air Bombardment seems like ‘in spirit’ the same as Air Attach/Sortie. Should I remove it when using the NFP rules and Air Combat deck?

I think that you are right. Armor factory is specific to Sword of Stalingrad and Rats in a factory.
Air Bombardment is used only when you aren’t playing with Air Rules or NFP rules.