message: Fix clang 3.8 build
diff: @@ -22,6 +22,7 @@ void Reflect(Writer& visitor, lsCodeLensCommandArguments& value) {
  Reflect(visitor, value.locations);
  visitor.EndArray();
  }
  +#if false
  void Reflect(Reader& visitor, lsCodeLensCommandArguments& value) {
  auto it = visitor.Begin();
  Reflect(*it, value.uri);
  @@ -30,6 +31,7 @@ void Reflect(Reader& visitor, lsCodeLensCommandArguments& value) {
  ++it;
  Reflect(*it, value.locations);
  }
  +#endif
  using TCodeLens = lsCodeLens<lsCodeLensUserData, lsCodeLensCommandArguments>;
  struct Ipc_TextDocumentCodeLens : public IpcMessage<Ipc_TextDocumentCodeLens> {
  