According to F1, no, but according to the international press, that's exactly what happened, saying that Niels Wiitich has been adding too much fuel to the fire in recent times...
The FIA has unexpectedly announced today that Formula One World Championship race director Niels Wittich will be leaving his position with immediate effect. The German was looking for “new opportunities” in a statement released this afternoon, which is why he is leaving so suddenly, ahead of the Las Vegas Grand Prix…
"The FIA can confirm that Niels Wittich has left his position as F1 Race Director to pursue new opportunities. Niels has performed his duties as Race Director with dedication and professionalism, and we thank him for this and wish him every success in the future," the statement said.
Meanwhile, the international press is increasingly reporting that there were serious differences between Wittich and FIA President Mohammed ben Sulayem. And because of this, Wittich's hands were tied, he would have to go at the end of the year anyway... Most likely, all this was because the FIA constantly punished the drivers with insignificant shit: swearing, body jewelry, underwear. The final push for his dismissal was probably given by the drivers' organization's open letter.
