Remove unused friend declaration from ParsedRtcEventLog.

Bug: NONE
Change-Id: I987f13807a7aece16e88e9ff1c5b443b0213c488
Reviewed-on: https://webrtc-review.googlesource.com/c/118181
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Commit-Queue: Zach Stein <zstein@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26310}
diff --git a/logging/rtc_event_log/rtc_event_log_parser.h b/logging/rtc_event_log/rtc_event_log_parser.h
index dc23944..7419d45 100644
--- a/logging/rtc_event_log/rtc_event_log_parser.h
+++ b/logging/rtc_event_log/rtc_event_log_parser.h
@@ -219,8 +219,6 @@
 };
 
 class ParsedRtcEventLog {
-  friend class RtcEventLogTestHelper;
-
  public:
   enum class MediaType { ANY, AUDIO, VIDEO, DATA };
   enum class UnconfiguredHeaderExtensions {