According to the information, CPL files are control panel extension files. Each CPL file actually corresponds to a function of the system. If you remove them, the corresponding functions are limited. The following lists the functions of various CPL files for your reference.
Access. Cpl corresponds to "Auxiliary option attributes"
Appwiz. Cpl corresponds to "Add/Delete"ProgramAttribute"
Desk. Cpl corresponds to "display attribute"
Intl. Cpl corresponds to "region setting attribute"
Inetcpl. Cpl corresponds to "Internet attributes"
Joy. Cpl corresponds to "game controller"
Main. Cpl corresponds to "Mouse property"
Mmsys. Cpl corresponds to "Multimedia attributes"
Netcpl. Cpl corresponds to "Network attribute"
Password. Cpl corresponds to "Password attribute"
Powercfg. Cpl corresponds to "Power Management Properties"
Sticpl. Cpl corresponds to "scanner and digital camera attributes"
Sysdm. Cpl corresponds to "system attributes"
Telephon. Cpl corresponds to "Dialing property"
TimeDate. Cpl corresponds to "date/time attribute"