How can I return/eliminate built gates?

[kcclieou]

I built one more gate that I would need a moment ago by mistake (you guys probably have some idea how Firefox refreshes a page), and this extra gate won't be utilized, at least in the near future. How can I eliminate this gate so that I can save the gate maintenance fee?

[StephenM]

Email  with your user ID, world ID, airport ID (preferred) or alternatively the airport code. Then tell us how many gates you would like to have removed.