Remove bad DCHECK added as part of https://codereview.webrtc.org/2452163004/

webrtc/video/video_receive_stream.cc

Index: webrtc/video/video_receive_stream.cc
diff --git a/webrtc/video/video_receive_stream.cc b/webrtc/video/video_receive_stream.cc
index 25418c4d8fe40df1f1d1e07b8d41a4e55646ae2a..a4097348bad88b264be3f7fab547c32948e6e413 100644
--- a/webrtc/video/video_receive_stream.cc
+++ b/webrtc/video/video_receive_stream.cc
@@ -285,7 +285,6 @@ bool VideoReceiveStream::DeliverRtp(const uint8_t* packet,
 
 bool VideoReceiveStream::OnRecoveredPacket(const uint8_t* packet,
                                            size_t length) {
-  RTC_DCHECK_RUN_ON(&worker_thread_checker_);
   return rtp_stream_receiver_.OnRecoveredPacket(packet, length);
 }