What Air France-KLM wants is a reduction in short distance flights in order to remain competitive on long distance ones (which are presumably more profitable). Air France-KLM uses Schiphol Amsterdam Airport as the hub for the majority of their KLM flights, but Schiphol has reached the ceiling in terms of allowed flight movements.
The plan was to offload Schiphol's low-cost holiday flights to the newly built Lelystad Airport, which should have been opened by now. However, Lelystad Airport's opening has just been postponed for the third time (and may never open at all), because it will likely exceed legal limits of nitrogen oxide emissions (amongst other issues, not all environmental).
Instead, they appear to wish to replace short distance flights with long haul ones (at least at Schiphol).