Clean up examples

native_client_sdk/src/examples/hello_world/helper_functions.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.
-
-#ifndef EXAMPLES_HELLO_WORLD_HELPER_FUNCTIONS_H_
-#define EXAMPLES_HELLO_WORLD_HELPER_FUNCTIONS_H_
-
-/// @file
-/// These functions are stand-ins for your complicated computations which you
-/// want to run in native code.  We do two very simple things:  return 42, and
-/// reverse a string.  But you can imagine putting more complicated things here
-/// which might be difficult or slow to achieve in JavaScript, such as
-/// cryptography, artificial intelligence, signal processing, physics modeling,
-/// etc.  See hello_world.cc for the code which is required for loading a NaCl
-/// application and exposing methods to JavaScript.
-
-#include <ppapi/c/pp_stdint.h>
-#include <string>
-
-namespace hello_world {
-
-/// This is the module's function that does the work to compute the value 42.
-int32_t FortyTwo();
-
-/// This function is passed a string and returns a copy of the string with the
-/// characters in reverse order.
-/// @param[in] text The string to reverse.
-/// @return A copy of @a text with the characters in reverse order.
-std::string ReverseText(const std::string& text);
-
-}  // namespace hello_world
-
-#endif  // EXAMPLES_HELLO_WORLD_HELPER_FUNCTIONS_H_
-