# File lib/openshift-origin-controller/app/models/application.rb, line 887
  def remove_env_var(key)
    reply = ResultIO.new
    s,f = run_on_gears(nil,reply,false) do |gear,r|
      r.append gear.remove_env_var(key)
    end
    raise f[0][:exception] if(f.length > 0)    
    reply
  end