Remove clock drift metric from NetEq.

This metric is not used anywhere and is not calculated correctly when the delay manager is in relative arrival delay mode.

Bug: webrtc:10333
Change-Id: Iac79ab40b79b17802ad9d626c130e82f761bae26
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/150786
Reviewed-by: Henrik Lundin <henrik.lundin@webrtc.org>
Reviewed-by: Oskar Sundbom <ossu@webrtc.org>
Commit-Queue: Jakob Ivarsson <jakobi@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29037}
diff --git a/audio/audio_receive_stream_unittest.cc b/audio/audio_receive_stream_unittest.cc
index d6c6afe..a14e8e1 100644
--- a/audio/audio_receive_stream_unittest.cc
+++ b/audio/audio_receive_stream_unittest.cc
@@ -70,7 +70,7 @@
 const NetworkStatistics kNetworkStats = {
     123, 456, false, 789012, 3456, 123, 456, 789, 543, 432,
     321, 123, 101,   0,      {},   789, 12,  345, 678, 901,
-    0,   -1,  -1,    -1,     -1,   -1,  0,   0,   0,   0};
+    0,   -1,  -1,    -1,     -1,   0,   0,   0,   0};
 const AudioDecodingCallStats kAudioDecodeStats = MakeAudioDecodeStatsForTest();
 
 struct ConfigHelper {