GafferUI : Removed explicit use of PathPlugValueWidget.
GafferUI : Removed explicit use of PathPlugValueWidget.

This is now used via metadata registrations.

lucienfostier/gaffer,boberfly/gaffer,andrewkaufman/gaffer,andrewkaufman/gaffer,appleseedhq/gaffer,appleseedhq/gaffer,lucienfostier/gaffer,hradec/gaffer,hradec/gaffer,boberfly/gaffer,hradec/gaffer,GafferHQ/gaffer,lucienfostier/gaffer,appleseedhq/gaffer,ImageEngine/gaffer,ivanimanishi/gaffer,chippey/gaffer,johnhaddon/gaffer,ImageEngine/gaffer,GafferHQ/gaffer,ImageEngine/gaffer,andrewkaufman/gaffer,hradec/gaffer,ivanimanishi/gaffer,andrewkaufman/gaffer,johnhaddon/gaffer,GafferHQ/gaffer,appleseedhq/gaffer,johnhaddon/gaffer,boberfly/gaffer,chippey/gaffer,chippey/gaffer,johnhaddon/gaffer,andrewkaufman/gaffer,ivanimanishi/gaffer,GafferHQ/gaffer,ImageEngine/gaffer,boberfly/gaffer,johnhaddon/gaffer,lucienfostier/gaffer,hradec/gaffer,ivanimanishi/gaffer,GafferHQ/gaffer,chippey/gaffer