Remove ClientLogin support from remoting host

remoting/host/host_config.h

Index: remoting/host/host_config.h
diff --git a/remoting/host/host_config.h b/remoting/host/host_config.h
index 198ddbb693118e57c1b63a14ae534ccb389c5d32..1ec35ce9c863297b41fc35187b631af0bfc03ac1 100644
--- a/remoting/host/host_config.h
+++ b/remoting/host/host_config.h
@@ -27,12 +27,8 @@ extern const char kHostOwnerConfigPath[];
 extern const char kHostOwnerEmailConfigPath[];
 // Login used to authenticate in XMPP network (could be a service account).
 extern const char kXmppLoginConfigPath[];
-// Auth token used to authenticate to XMPP network.
-extern const char kXmppAuthTokenConfigPath[];
 // OAuth refresh token used to fetch an access token for the XMPP network.
 extern const char kOAuthRefreshTokenConfigPath[];
-// Auth service used to authenticate to XMPP network.
-extern const char kXmppAuthServiceConfigPath[];
 // Unique identifier of the host used to register the host in directory.
 // Normally a random UUID.
 extern const char kHostIdConfigPath[];