Revert "Add output reference to gen written files."

tools/gn/ninja_build_writer.cc

Index: tools/gn/ninja_build_writer.cc
diff --git a/tools/gn/ninja_build_writer.cc b/tools/gn/ninja_build_writer.cc
index d27ebdcce66420b813f64cafbbdffc505809911b..50638fbb7876819438dea2b6dbe659779da72731 100644
--- a/tools/gn/ninja_build_writer.cc
+++ b/tools/gn/ninja_build_writer.cc
@@ -180,23 +180,10 @@ bool NinjaBuildWriter::RunAndWriteFile(
 void NinjaBuildWriter::WriteNinjaRules() {
   out_ << "rule gn\n";
   out_ << "  command = " << GetSelfInvocationCommand(build_settings_) << "\n";
-  out_ << "  description = Regenerating ninja files\n";
-  out_ << "  restat = 1\n\n";
+  out_ << "  description = Regenerating ninja files\n\n";
 
-  // This rule will regenerate the ninja files when any input file has changed,
-  // or is missing.
-  out_ << "build build.ninja";
-
-  // Other files read by the build.
-  EscapeOptions path_escaping;
-  path_escaping.mode = ESCAPE_NINJA_COMMAND;
-  std::vector<SourceFile> written_files = g_scheduler->GetWrittenFiles();
-  for (const auto& written_file : written_files)
-    out_ << " " << EscapeString(RebasePath(written_file.value(),
-        build_settings_->build_dir(), build_settings_->root_path_utf8()),
-        path_escaping, nullptr);
-
-  out_ << ": gn\n"
+  // This rule will regenerate the ninja files when any input file has changed.
+  out_ << "build build.ninja: gn\n"
        << "  generator = 1\n"
        << "  depfile = build.ninja.d\n";