Delete deprecated EncoderSimulcastProxy constructor

Bug: None
Change-Id: Ib55a3f6f051b829c0102a698c4a476ade3c9ab83
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/229180
Reviewed-by: Per Kjellander <perkj@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34794}
diff --git a/media/engine/encoder_simulcast_proxy.cc b/media/engine/encoder_simulcast_proxy.cc
index 7a6638f5..f906847 100644
--- a/media/engine/encoder_simulcast_proxy.cc
+++ b/media/engine/encoder_simulcast_proxy.cc
@@ -22,10 +22,7 @@
   encoder_ = factory_->CreateVideoEncoder(format);
 }
 
-EncoderSimulcastProxy::EncoderSimulcastProxy(VideoEncoderFactory* factory)
-    : EncoderSimulcastProxy(factory, SdpVideoFormat("VP8")) {}
-
-EncoderSimulcastProxy::~EncoderSimulcastProxy() {}
+EncoderSimulcastProxy::~EncoderSimulcastProxy() = default;
 
 int EncoderSimulcastProxy::Release() {
   return encoder_->Release();
diff --git a/media/engine/encoder_simulcast_proxy.h b/media/engine/encoder_simulcast_proxy.h
index 8e9e0ff..a8c28ad 100644
--- a/media/engine/encoder_simulcast_proxy.h
+++ b/media/engine/encoder_simulcast_proxy.h
@@ -35,10 +35,6 @@
  public:
   EncoderSimulcastProxy(VideoEncoderFactory* factory,
                         const SdpVideoFormat& format);
-  // Deprecated. Remove once all clients use constructor with both factory and
-  // SdpVideoFormat;
-  explicit EncoderSimulcastProxy(VideoEncoderFactory* factory);
-
   ~EncoderSimulcastProxy() override;
 
   // Implements VideoEncoder.