Remove old Authentication code that we don't use or need.

remoting/client/chromoting_view.h

Index: remoting/client/chromoting_view.h
diff --git a/remoting/client/chromoting_view.h b/remoting/client/chromoting_view.h
index c54651323da0cc088e8ab8c4f6249a1db24ae123..1f1a769e7bba5bf65a8b97cf3cf1effa2eef00fa 100644
--- a/remoting/client/chromoting_view.h
+++ b/remoting/client/chromoting_view.h
@@ -56,11 +56,6 @@ class ChromotingView {
   virtual void SetConnectionState(protocol::ConnectionToHost::State state,
                                   protocol::ConnectionToHost::Error error) = 0;
 
-  // Update the status of the last login attempt. Updating the UI as needed.
-  // |success| is set to true if the last login successful otherwise false.
-  // |info| contains the error information if available.
-  virtual void UpdateLoginStatus(bool success, const std::string& info) = 0;
-
   // Return the horizontal scale factor of this view.
   virtual double GetHorizontalScaleRatio() const = 0;