Remove QUIC support from remoting host and client.

remoting/protocol/session_config.h

Index: remoting/protocol/session_config.h
diff --git a/remoting/protocol/session_config.h b/remoting/protocol/session_config.h
index 591a6af93378bc1f685e0f4e20d4cd15ff852bc3..83b711ec15991934ef3c71b8624300e5a5030fb2 100644
--- a/remoting/protocol/session_config.h
+++ b/remoting/protocol/session_config.h
@@ -23,7 +23,6 @@ struct ChannelConfig {
   enum TransportType {
     TRANSPORT_STREAM,
     TRANSPORT_MUX_STREAM,
-    TRANSPORT_QUIC_STREAM,
     TRANSPORT_DATAGRAM,
     TRANSPORT_NONE,
   };
@@ -106,9 +105,6 @@ class SessionConfig {
     return audio_config_.transport != ChannelConfig::TRANSPORT_NONE;
   }
 
-  // Returns true if any of the channels is using QUIC.
-  bool is_using_quic() const;
-
  private:
   SessionConfig(Protocol protocol);