message: [XLA] Don't display metadata inline in HLO graph dump.
  We only want to display it in the tooltip.
diff: @@ -788,8 +788,8 @@ string HloDotDumper::DumpInstruction(const HloInstruction* instr) {
  }
  // Build the text that will be displayed inside the node.
  string node_body = node_label;
  - for (const string& s : {trivial_subcomputation, node_metadata,
  - node_backend_config, extra_info, inlined_constants}) {
  + for (const string& s : {trivial_subcomputation, node_backend_config,
  + extra_info, inlined_constants}) {
  if (!s.empty()) {
  StrAppend(&node_body, "<br/>", s);
  }
  