[docs] remove deprecated symbol references and add some unused symbols
[docs] remove deprecated symbol references and add some unused symbols

clutter-project/mx,clutter-project/mx,jonnylamb/mx,jonnylamb/mx,clutter-project/mx,pwithnall/mx,jonnylamb/mx,pwithnall/mx,clutter-project/mx,jonnylamb/mx,pwithnall/mx,pwithnall/mx