drop now unused ListBoxWrapper

Change-Id: I19271de67269a9e23cf889a32910405cf3dc7a2a

drop unused SingleControlWrapper

Change-Id: I80bd639a9d64a1b35249c1c59c1c9d134ae6f1ca

drop unused PosValueMapper

Change-Id: I5e3d9ed48b5f544215ae82ba7899a62be4e59a25

drop unused ControlWrapperBase

Change-Id: I1890f492604ac848775e8d4b0070a3189a719a18

drop now empty itemconnect.cxx

Change-Id: I5374dbf91dbe715a563e7c694c9d96fb07d8f9c8

drop unnecessary controlwrapper.hxx

Change-Id: Ide633f64ca2851aee4f29a7f86e09cb78043d388
Reviewed-on: https://gerrit.libreoffice.org/67887
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>