Remove redundant mapping.

It looks like the map `content_specific_stats_` is just carried over into `aggregated_stats` without doing any important processing. This seems to be redundant and hence, removing it in this CL.

Bug: None
Change-Id: Ia4a5de03999ecd33d387014928cba322bb11ee93
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/360745
Commit-Queue: Emil Vardar (xWF) <vardar@google.com>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#42870}
diff --git a/video/receive_statistics_proxy.cc b/video/receive_statistics_proxy.cc
index b5c03bf..05dafbd 100644
--- a/video/receive_statistics_proxy.cc
+++ b/video/receive_statistics_proxy.cc
@@ -234,18 +234,7 @@
   if (delay_ms)
     RTC_HISTOGRAM_COUNTS_10000("WebRTC.Video.OnewayDelayInMs", *delay_ms);
 
-  // Aggregate content_specific_stats_ by removing experiment or simulcast
-  // information;
-  std::map<VideoContentType, ContentSpecificStats> aggregated_stats;
   for (const auto& it : content_specific_stats_) {
-    // Calculate simulcast specific metrics (".S0" ... ".S2" suffixes).
-    VideoContentType content_type = it.first;
-    // Calculate aggregated metrics (no suffixes. Aggregated on everything).
-    content_type = it.first;
-    aggregated_stats[content_type].Add(it.second);
-  }
-
-  for (const auto& it : aggregated_stats) {
     // For the metric Foo we report the following slices:
     // WebRTC.Video.Foo,
     // WebRTC.Video.Screenshare.Foo,