misc: remove unused code from old LRC models

CMakeLists.txt

src/accountcreationwizard.cpp

src/accountgeneraltab.cpp

src/avatarmanipulation.cpp

src/conversationpopupmenu.cpp

src/currentcallview.cpp

src/generalsettingsview.cpp

src/models/namenumberfilterproxymodel.cpp

src/models/namenumberfilterproxymodel.h

src/ring_client.cpp

src/ringmainwindow.cpp

src/ringnotify.cpp

src/ringwelcomeview.cpp

src/utils/accounts.cpp

src/utils/accounts.h

src/utils/calling.cpp

src/utils/calling.h

src/video/video_widget.cpp