Remove source from crash-reporter and crash-dumper as they are no longer necessary.

system_logging.h

-// Copyright (c) 2010 The Chromium OS 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 CRASH_SYSTEM_LOGGING_H_
-#define CRASH_SYSTEM_LOGGING_H_
-
-#include <string>
-
-class SystemLogging {
- public:
-  virtual void Initialize(const char *ident) = 0;
-  virtual void LogInfo(const char *format, ...) = 0;
-  virtual void LogWarning(const char *format, ...) = 0;
-  virtual void LogError(const char *format, ...) = 0;
-};
-
-class SystemLoggingImpl : public SystemLogging {
- public:
-  SystemLoggingImpl();
-  virtual ~SystemLoggingImpl();
-  virtual void Initialize(const char *ident);
-  virtual void LogInfo(const char *format, ...);
-  virtual void LogWarning(const char *format, ...);
-  virtual void LogError(const char *format, ...);
- private:
-  static std::string identity_;
-};
-
-#endif  // CRASH_SYSTEM_LOGGING_H_