Remove code that just duplicates what SetAnonymousContentFor(content, nsnull)

    nsIPresShell *shell = aOldDocument->GetShellAt(i);

    NS_ASSERTION(shell != nsnull, "Zoiks! nsIDocument::GetShellAt() broke");

    // See if the element has nsIAnonymousContentCreator-created

    // anonymous content...

    // now clear out the anonymous content for this node in the old presshell.

    // XXXbz this really doesn't belong here, somehow... either that, or we

    // need to better define what sort of bindings we're managing.

    nsCOMPtr<nsISupportsArray> anonymousElements;

    shell->GetAnonymousContentFor(aContent, getter_AddRefs(anonymousElements));

    if (anonymousElements) {

      // ...yep, so be sure to update the doc pointer in those

      // elements, too.

      PRUint32 count;

      anonymousElements->Count(&count);

      while (PRInt32(--count) >= 0) {

        nsCOMPtr<nsIContent> content( do_QueryElementAt(anonymousElements, count));

        NS_ASSERTION(content != nsnull, "not an nsIContent");

        if (! content)

          continue;

        content->UnbindFromTree();

      }

    }

    // now clear out the anonymous content for this node in the old presshell.

    shell->SetAnonymousContentFor(aContent, nsnull);

  }