Remove ClientLogin support from remoting host

remoting/signaling/xmpp_signal_strategy.h

Index: remoting/signaling/xmpp_signal_strategy.h
diff --git a/remoting/signaling/xmpp_signal_strategy.h b/remoting/signaling/xmpp_signal_strategy.h
index 18ae84141b41c1be73f07d3a0ce915eaa604bef8..2d8268b786134ecfc36883a054cb90458a40e719 100644
--- a/remoting/signaling/xmpp_signal_strategy.h
+++ b/remoting/signaling/xmpp_signal_strategy.h
@@ -50,7 +50,6 @@ class XmppSignalStrategy : public base::NonThreadSafe,
 
     std::string username;
     std::string auth_token;
-    std::string auth_service;
   };
 
   XmppSignalStrategy(
@@ -77,8 +76,7 @@ class XmppSignalStrategy : public base::NonThreadSafe,
   // access token is renewed). It is OK to call this even when we are in the
   // CONNECTED state. It will be used on the next Connect() call.
   void SetAuthInfo(const std::string& username,
-                   const std::string& auth_token,
-                   const std::string& auth_service);
+                   const std::string& auth_token);
 
   // Use this method to override the default resource name used (optional).
   // This will be used on the next Connect() call.