It means, Dynatrace is discovering services automatically and you want to turn off some of them. It means, you do not want Dynatrace auto-discover some of them. Is that your use case?
If yes, you need to configure process group monitoring rules since Services are discoved by process related.
According to this topic Exclude or Disable detected service, I'm afraid that is not possible to do it in "clean" way.
Maybe try to define request naming rules to group relevant from non-relevant requests and then "mute" them.
Or try to exclude web request url's (Settings->Server-side service monitoring->Deep monitoring).
Hope you find your solution!