def delete_engine(engine_id, scope = 'silo')
      xml = make_xml('EngineDeleteRequest', { 'engine-id' => engine_id, 'scope' => scope })
      response = execute(xml, '1.2')
      response.success
    end
def delete_engine(engine_id, scope = 'silo')
      xml = make_xml('EngineDeleteRequest', { 'engine-id' => engine_id, 'scope' => scope })
      response = execute(xml, '1.2')
      response.success
    end
Removes a scan engine from the list of available engines.

 @param [Fixnum] engine_id Unique ID of an existing engine to remove.
 @param [String] scope Whether the engine is global or silo scoped.
 @return [Boolean] true if engine successfully deleted.