Revert of Propagate probing cluster id to SendTimeHistory.

webrtc/modules/rtp_rtcp/include/rtp_rtcp.h

Index: webrtc/modules/rtp_rtcp/include/rtp_rtcp.h
diff --git a/webrtc/modules/rtp_rtcp/include/rtp_rtcp.h b/webrtc/modules/rtp_rtcp/include/rtp_rtcp.h
index 0dd3a89bd719186069978d5677fd7d653f263540..66589888bda4263496fdc99887bb2c56c4fe1a2d 100644
--- a/webrtc/modules/rtp_rtcp/include/rtp_rtcp.h
+++ b/webrtc/modules/rtp_rtcp/include/rtp_rtcp.h
@@ -315,10 +315,9 @@
     virtual bool TimeToSendPacket(uint32_t ssrc,
                                   uint16_t sequence_number,
                                   int64_t capture_time_ms,
-                                  bool retransmission,
-                                  int probe_cluster_id) = 0;
-
-    virtual size_t TimeToSendPadding(size_t bytes, int probe_cluster_id) = 0;
+                                  bool retransmission) = 0;
+
+    virtual size_t TimeToSendPadding(size_t bytes) = 0;
 
     // Called on generation of new statistics after an RTP send.
     virtual void RegisterSendChannelRtpStatisticsCallback(