Revert "Reland "Moved congestion controller to task queue.""

This reverts commit 57daeb7ac7f3d80992905b53fea500953fcfd793.

Reason for revert: Cause increased congestion and deadlocks in downstream project

Original change's description:
> Reland "Moved congestion controller to task queue."
> 
> This is a reland of 0cbcba7ea0dced1a7f353c64d6cf91d46ccb29f9.
> 
> Original change's description:
> > Moved congestion controller to task queue.
> > 
> > The goal of this work is to make it easier to experiment with the
> > bandwidth estimation implementation. For this reason network control
> > functionality is moved from SendSideCongestionController(SSCC),
> > PacedSender and BitrateController to the newly created
> > GoogCcNetworkController which implements the newly created
> > NetworkControllerInterface. This allows the implementation to be
> > replaced at runtime in the future.
> > 
> > This is the first part of a split of a larger CL, see:
> > https://webrtc-review.googlesource.com/c/src/+/39788/8
> > For further explanations.
> > 
> > Bug: webrtc:8415
> > Change-Id: I770189c04cc31b313bd4e57821acff55fbcb1ad3
> > Reviewed-on: https://webrtc-review.googlesource.com/43840
> > Commit-Queue: Sebastian Jansson <srte@webrtc.org>
> > Reviewed-by: Björn Terelius <terelius@webrtc.org>
> > Reviewed-by: Stefan Holmer <stefan@webrtc.org>
> > Cr-Commit-Position: refs/heads/master@{#21868}
> 
> Bug: webrtc:8415
> Change-Id: I1d1756a30deed5b421b1c91c1918a13b6bb455da
> Reviewed-on: https://webrtc-review.googlesource.com/48000
> Reviewed-by: Stefan Holmer <stefan@webrtc.org>
> Commit-Queue: Sebastian Jansson <srte@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#21899}

TBR=terelius@webrtc.org,stefan@webrtc.org,srte@webrtc.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: webrtc:8415
Change-Id: Ida8074dcac2cc28b3629228eb22846d8a8e81b83
Reviewed-on: https://webrtc-review.googlesource.com/52980
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22017}
diff --git a/modules/bitrate_controller/bitrate_controller_unittest.cc b/modules/bitrate_controller/bitrate_controller_unittest.cc
index 8bd7800..66ca5b9 100644
--- a/modules/bitrate_controller/bitrate_controller_unittest.cc
+++ b/modules/bitrate_controller/bitrate_controller_unittest.cc
@@ -340,11 +340,11 @@
   report_blocks.clear();
 
   // All packets lost on stream with few packets, no back-off.
-  report_blocks.push_back(CreateReportBlock(1, 2, 0, sequence_number[0]));
+  report_blocks.push_back(CreateReportBlock(1, 2, 1, sequence_number[0]));
   report_blocks.push_back(CreateReportBlock(1, 3, 255, sequence_number[1]));
   bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, 50, time_ms);
   EXPECT_EQ(bitrate_observer_.last_bitrate_, last_bitrate);
-  EXPECT_EQ(WeightedLoss(20, 0, 1, 255), bitrate_observer_.last_fraction_loss_);
+  EXPECT_EQ(WeightedLoss(20, 1, 1, 255), bitrate_observer_.last_fraction_loss_);
   EXPECT_EQ(50, bitrate_observer_.last_rtt_);
   last_bitrate = bitrate_observer_.last_bitrate_;
   sequence_number[0] += 20;