message: Remove unused pc level test  MediaHelper constructor
  Follow up on after an upstream project was updated.
  Cr-Commit-Position: refs/heads/master@{#32036}
diff: @@ -26,13 +26,6 @@ namespace webrtc_pc_e2e {
  class MediaHelper {
  public:
  - MediaHelper(VideoQualityAnalyzerInjectionHelper*
  - video_quality_analyzer_injection_helper,
  - TaskQueueFactory* task_queue_factory)
  - : MediaHelper(video_quality_analyzer_injection_helper,
  - task_queue_factory,
  - Clock::GetRealTimeClock()) {}
  -
  MediaHelper(VideoQualityAnalyzerInjectionHelper*
  video_quality_analyzer_injection_helper,
  TaskQueueFactory* task_queue_factory,
  