message: Remove old Start method from VideoQualityAnalyzerInjectionHelper
  Cr-Commit-Position: refs/heads/master@{#31452}
diff: @@ -76,9 +76,6 @@ class VideoQualityAnalyzerInjectionHelper : public StatsObserverInterface {
  void Start(std::string test_case_name,
  rtc::ArrayView<const std::string> peer_names,
  int max_threads_count);
  - void Start(std::string test_case_name, int max_threads_count) {
  - Start(test_case_name, std::vector<std::string>{}, max_threads_count);
  - }
  // Forwards |stats_reports| for Peer Connection |pc_label| to
  // |analyzer_|.
  