LibWeb: Don't include object addresses in layout tree dumps

I've used this feature less than 3 times, and it's trivial to hack back
in if/when needed. Let's stop cluttering the layout tree dumps.

Userland/Libraries/LibWeb/Dump.cpp

@@ -165,9 +165,6 @@ void dump_tree(StringBuilder& builder, Layout::Node const& layout_node, bool sho
             color_off,
             identifier.characters());
 
-        if (interactive)
-            builder.appendff("@{:p} ", &layout_node);
-
         if (auto const* paint_box = box.paint_box()) {
             builder.appendff("at ({},{}) content-size {}x{}",
                 paint_box->absolute_x(),