Revert "dbus-manager: add an EmptyTrash operation"

This reverts commit 8116b5a43e11493d6e81a0a1e1ba67fa0d6289a4.
Revert "dbus-manager: implement the CopyURIs method"

This reverts commit be39d4a5f6b03a142e21d3d0448ef0e779e7e173.
Revert "dbus-manager: add a skeleton of NautilusDBusManager"

This reverts commit 08bc0644ebc869ff1db320cc2bdfc4a471a6f9ac.