Tiling2: Don't try to remove non-tiled windows from the tile tree.
Tiling2: Don't try to remove non-tiled windows from the tile tree.

tizenorg/platform.upstream.enlightenment,rvandegrift/e,tizenorg/platform.upstream.enlightenment,tasn/enlightenment,tizenorg/platform.upstream.enlightenment,rvandegrift/e,tasn/enlightenment,FlorentRevest/Enlightenment,FlorentRevest/Enlightenment,rvandegrift/e,FlorentRevest/Enlightenment,tasn/enlightenment