doc: Removed some sources that no longer exist
doc: Removed some sources that no longer exist

Refactoring of the controls eliminated some .qml files.
These are now removed from the sources variables in the
.qdocconf file.

Change-Id: I3642cf69b8625272fce8cc4b6911c08b2d1ef919
Reviewed-by: Jens Bache-Wiig <9cea9d70b08f8210134ec5959114f72bad51ed1d@digia.com>

drgvond/qtquickcontrols,jfaust/qtquickcontrols,jfaust/qtquickcontrols,drgvond/qtquickcontrols,mizukusak/qtquickcontrols,richardmg/qtcomponents,drgvond/qtquickcontrols,kobolabs/qtquickcontrols,jfaust/qtquickcontrols,kobolabs/qtquickcontrols,mizukusak/qtquickcontrols,kobolabs/qtquickcontrols,richardmg/qtcomponents,mizukusak/qtquickcontrols,richardmg/qtcomponents