Removes a ChildPart from the DOM, including any of its content and markers.
Note: The only difference between this and clearPart() is that this also
removes the part's start node. This means that the ChildPart must own its
start node, ie it must be a marker node specifically for this part and not an
anchor from surrounding content.
Removes a ChildPart from the DOM, including any of its content and markers.
Note: The only difference between this and clearPart() is that this also removes the part's start node. This means that the ChildPart must own its start node, ie it must be a marker node specifically for this part and not an anchor from surrounding content.