Delete the old flavor of RtcpTransceiverImpl::ReceivePacket

Bug: webrtc:11327
Change-Id: I612d734ebc9abc202972fb1aadcea976b06e81de
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/219792
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Commit-Queue: Paul Hallak <phallak@google.com>
Cr-Commit-Position: refs/heads/master@{#34081}

modules/rtp_rtcp/source/rtcp_transceiver_impl.h

diff --git a/modules/rtp_rtcp/source/rtcp_transceiver_impl.h b/modules/rtp_rtcp/source/rtcp_transceiver_impl.h
index e539b8c..bcdee83 100644
--- a/modules/rtp_rtcp/source/rtcp_transceiver_impl.h
+++ b/modules/rtp_rtcp/source/rtcp_transceiver_impl.h
@@ -49,11 +49,6 @@
 
   void SetReadyToSend(bool ready);
 
-  // ABSL_DEPRECATED("bugs.webrtc.org/11327"): Remove this flavor once
-  // downstream projects migrate.
-  void ReceivePacket(rtc::ArrayView<const uint8_t> packet, int64_t now_us) {
-    ReceivePacket(packet, Timestamp::Micros(now_us));
-  }
   void ReceivePacket(rtc::ArrayView<const uint8_t> packet, Timestamp now);
 
   void SendCompoundPacket();