Remove nested CC subsection

The main points have been integrated into the previous subsection.

draft-ietf-avtcore-rtp-over-quic.md

@@ -715,7 +715,7 @@ This document discusses aspects of transport level congestion control in
 congestion control algorithm for QUIC or rate adaptation algorithm for RTP.
 
 This document also gives guidance about avoiding problems with *nested*
-congestion controllers in {{nested-CC}}.
+congestion controllers in {{rate-adaptation-application-layer}}.
 
 This document also discusses congestion control implications of using shared or
 multiple separate QUIC connections to send and receive multiple independent data
@@ -800,41 +800,6 @@ The bandwidth estimation algorithm typically needs some feedback on the
 transmission performance. This feedback can be collected via RTCP or following
 the guidelines in {{rtcp-mapping}} and {{api-considerations}}.
 
-## Resolving Interactions Between QUIC and Application-layer Congestion Control {#nested-CC}
-
-Because QUIC is a congestion-controlled transport, as described in
-{{cc-quic-layer}}, and RTP applications can also perform congestion control and
-rate adaptation, as described in {{rate-adaptation-application-layer}},
-implementers should be aware of the possibility that these "nested" congestion
-control loops, where both controllers are managing rate adaptation for the same
-packet stream independently, may deliver problematic performance. Because this
-document is describing a specific case (media transport), we can provide some
-guidance to avoid the worst possible problems.
-
-- **Application-limited Media Flows** - if an application chooses RTP as its
-  transport mechanism, the goal will be maximizing the user experience, not
-  maximizing path bandwidth utilization. If the application is, in fact,
-  transmitting media that does not saturate path bandwidth, and paces its
-  transmission, more heavy-handed congestion control mechanisms (drastic
-  reductions in the sending rate when loss is detected, with much slower
-  increases when losses are no longer detected) should rarely come into play. If
-  the application chooses ROQ as its transport, sends enough media to saturate
-  the path bandwidth, and does not adapt its own sending rate, drastic measures
-  will be required in order to avoid sustained or oscillating congestion along
-  the path.
-
-- **Awareness of Bufferbloat** - modern general-purpose congestion controllers
-  do not adjust  their sending rates based only on packet loss. For example, BBR
-  ("Bottleneck Bandwidth and Round-trip propagation time")
-  {{?I-D.cardwell-iccrg-bbr-congestion-control}} describes its strategy for
-  adapting sending rates in this way:
-
-> (BBR) "uses recent measurements of a transport connection's delivery rate,
-> round-trip time, and packet loss rate to build an explicit model of the
-> network path. BBR then uses this model to control both how fast it sends data
-> and the maximum volume of data it allows in flight in the network at any
-> time."
-
 ## Sharing QUIC connections {#shared-connections}
 
 Two endpoints may establish channels in order to exchange more than one type of