[DVQA] Remove old constructor from StatsKey

Bug: b/205824594
Change-Id: I081ca48978ce498c56f47022e28fa0a66846765f
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/238667
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35405}
diff --git a/test/pc/e2e/analyzer/video/default_video_quality_analyzer_shared_objects.h b/test/pc/e2e/analyzer/video/default_video_quality_analyzer_shared_objects.h
index 4f12aa7..8f75328 100644
--- a/test/pc/e2e/analyzer/video/default_video_quality_analyzer_shared_objects.h
+++ b/test/pc/e2e/analyzer/video/default_video_quality_analyzer_shared_objects.h
@@ -157,12 +157,6 @@
 };
 
 struct StatsKey {
-  // Keep this constructor for temporary backward compatibility.
-  StatsKey(std::string stream_label,
-           std::string /*sender*/,
-           std::string receiver)
-      : stream_label(std::move(stream_label)), receiver(std::move(receiver)) {}
-
   StatsKey(std::string stream_label, std::string receiver)
       : stream_label(std::move(stream_label)), receiver(std::move(receiver)) {}