Probably the settings app which is there to replace the control panel of old. It's very dumbed down, and frequently has to launch cpls itself to allow you to do more complex things.
FYI you can still get the control panel, just hit windows key and type "control panel". (Note, it appears for me after just CON, so you probably won't have to type the whole word, depending on what you have installed)
They removed that in the newest beta build. Now it has a menu option to the new settings app. Pretty stupid. They haven't even finished transferring everything yet.
I get most pissed off at the crapware that keeps getting re-installed. I don't want Microsoft's weather, news, money, music, contacts, calendar, etc... You can uninstall most of them by right clicking and choosing install but others require a PowerShell script.
My advice - do it all by script and keep the script because you are going to need it again when Microsoft decides to re-install all of it.
(You'd think there would be an answer to this somewhere, but I haven't found one that is more than a puff piece.)