Remove the custom phone/sms action handling

This is now entirely unused as we use the system default handling of
tel:/sms: URIs. That isn't limited in which applications it supports,
and more importantly it gives the same behavior everywhere.

Once we depend on KContacts 5.106 the remaining custom address handling
can also go in favor of standard geo: URIs. ContactDefaultActions then
is reduced to basically just a QDesktopServices::openUrl call.