Remove unused pc level test  MediaHelper constructor

Follow up on https://webrtc-review.googlesource.com/c/src/+/183363 after an upstream project was updated.

Bug: None
Change-Id: I8c789a948c5ea1cb36f76ff6fa3b4618e295c700
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/183365
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32036}
diff --git a/test/pc/e2e/media/media_helper.h b/test/pc/e2e/media/media_helper.h
index a707063..4e977e3 100644
--- a/test/pc/e2e/media/media_helper.h
+++ b/test/pc/e2e/media/media_helper.h
@@ -28,13 +28,6 @@
  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,
               Clock* clock)
       : clock_(clock),