Remove dead code from the configures

This removes the options to disable several modules, as they are in
separate repositories now and can be "disabled" by simply not compiling
them.
Note that this leaves some configuration options for these separate
modules in, as they have no own configures. This is ugly, but has to
stay that way for the time being.

Some other dead code had to go as well, just like accepting the obsolete
-qdbus option.

Change-Id: Ibb26e4f48ca8239c2c4396e4abefab4c87322be2
Reviewed-by: Thiago Macieira <[email protected]>