The default Personnel Management Types are hard-coded, which means that there is no way to erase them from the software.
But we can hide them from Users through their Permission Profile by applying a "template.wps" which can be configure to hide certain menu options from users. See this article on how to configure and setup the template.
Default Personnel Management types are: Sick, Vacation, Shift, Unavailable, etc. If one is not needed or should not be available for a User, follow the steps below to hide it.
Once you have configured the pop up settings, back in the farmerswife Client application, "Shifts" and "FreeDay" are hidden from the Personal popup window for the User Peter. 
*Note: The Personnel Management Types are hidden in the Desktop Client only, and remain visible in the Mobile, iOs and Web Clients.