The answer is probably Parques
Yeah, this. TusenFryd has also lost almost all its flat rides since Parques Reunidos took over. I suppose they are considered too expensive to operate for too little guest draw.
Removing flat rides appears to be a general trend all over the industry, it seems like. They make a solid addition to the lineup of most parks, but they tend to be somewhat low-profile rides, so their existence is barely influencing people's decisions to visit the parks. People come for the coasters, and tend to stay for the flat rides ... but strictly speaking, parks don't need people to stay once they've paid the ticket price. That being said, I don't think I'd quite subscribe to that line of thought myself. You gotta give guests something to do and somewhere to be (queuing), otherwise there will just be more lines for the headliner attractions, and the lack of diversity in a lineup will eventually leave the park with a poorer reputation.