Remove V1 authenticators

remoting/protocol/authentication_method.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // AuthenticationMethod represents an authentication algorithm and its
 // configuration. It knows how to parse and format authentication
 // method names.
 // Currently the following methods are supported:
-//   v1_token - deprecated V1 authentication mechanism,
 //   spake2_plain - SPAKE2 without hashing applied to the password.
 //   spake2_hmac - SPAKE2 with HMAC hashing of the password.
 
 #ifndef REMOTING_PROTOCOL_AUTHENTICATION_METHOD_H_
 #define REMOTING_PROTOCOL_AUTHENTICATION_METHOD_H_
 
 #include <string>
 
 namespace remoting {
 namespace protocol {
@@ skipping 55 matching lines @@
 
   // Parse string representation of a shared secret hash. The |as_string|
   // must be in form "<hash_function>:<hash_value_base64>".
   bool Parse(const std::string& as_string);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_AUTHENTICATION_METHOD_H_