fix 0537d32515bd807ce173240e7c93a32ec04d1b1f
fix 0537d32515bd807ce173240e7c93a32ec04d1b1f

remove MCompositeManagerPrivate::exposeDesktop() also from the header,
fixes build

nemomobile-graveyard/mcompositor,siraj/mcompositor,nemomobile-graveyard/mcompositor,nemomobile-graveyard/mcompositor,siraj/mcompositor,nemomobile-graveyard/mcompositor,siraj/mcompositor,nemomobile-graveyard/mcompositor,siraj/mcompositor,nemomobile-graveyard/mcompositor