Remove dead method NeedsIceRestart_n from JsepTransportController

This method is declared in the header and implemented in the .cc file
but has no callers either internally or externally.

Bug: none
Change-Id: I8d9d0e99e2bac46c46f44916862943c404ace897
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/469280
Reviewed-by: Evan Shrubsole <eshr@webrtc.org>
Commit-Queue: Evan Shrubsole <eshr@webrtc.org>
Auto-Submit: Tomas Gunnarsson <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#47595}

pc/jsep_transport_controller.cc

diff --git a/pc/jsep_transport_controller.cc b/pc/jsep_transport_controller.cc
index fda4db0..de012e2 100644
--- a/pc/jsep_transport_controller.cc
+++ b/pc/jsep_transport_controller.cc
@@ -283,13 +283,6 @@
   return false;
 }
 
-bool JsepTransportController::NeedsIceRestart_n(
-    absl::string_view transport_name) const {
-  RTC_DCHECK_RUN_ON(network_thread_);
-  const JsepTransport* transport = GetJsepTransportByName(transport_name);
-  return transport ? transport->needs_ice_restart() : false;
-}
-
 std::optional<SSLRole> JsepTransportController::GetDtlsRole(
     absl::string_view mid) const {
   if (signaling_thread_->IsCurrent()) {

pc/jsep_transport_controller.h

diff --git a/pc/jsep_transport_controller.h b/pc/jsep_transport_controller.h
index 709b392..61aecd7 100644
--- a/pc/jsep_transport_controller.h
+++ b/pc/jsep_transport_controller.h
@@ -289,10 +289,6 @@
       RTC_RUN_ON(network_thread_);
 
   // Always called via a blocking call from the signaling thread.
-  bool NeedsIceRestart_n(absl::string_view mid) const
-      RTC_RUN_ON(network_thread_);
-
-  // Always called via a blocking call from the signaling thread.
   bool RemoveRemoteCandidate_n(const IceCandidate* candidate)
       RTC_RUN_ON(network_thread_);