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diff --git a/src/ceph/src/common/config_obs.h b/src/ceph/src/common/config_obs.h
deleted file mode 100644
index 723f739..0000000
--- a/src/ceph/src/common/config_obs.h
+++ /dev/null
@@ -1,45 +0,0 @@
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-/*
- * Ceph - scalable distributed file system
- *
- * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
- *
- * This is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License version 2.1, as published by the Free Software
- * Foundation.  See file COPYING.
- *
- */
-
-#ifndef CEPH_CONFIG_OBS_H
-#define CEPH_CONFIG_OBS_H
-
-#include <set>
-#include <string>
-
-struct md_config_t;
-
-/** @brief Base class for configuration observers.
- * Use this as a base class for your object if it has to respond to configuration changes,
- * for example by updating some values or modifying its behavior.
- * Subscribe for configuration changes by calling the md_config_t::add_observer() method
- * and unsubscribe using md_config_t::remove_observer().
- */
-class md_config_obs_t {
-public:
-  virtual ~md_config_obs_t() {}
-  /** @brief Get a table of strings specifying the configuration keys in which the object is interested.
-   * This is called when the object is subscribed to configuration changes with add_observer().
-   * The returned table should not be freed until the observer is removed with remove_observer().
-   * Note that it is not possible to change the set of tracked keys without re-subscribing. */
-  virtual const char** get_tracked_conf_keys() const = 0;
-  /// React to a configuration change.
-  virtual void handle_conf_change(const struct md_config_t *conf,
-				  const std::set <std::string> &changed) = 0;
-  /// Unused for now
-  virtual void handle_subsys_change(const struct md_config_t *conf,
-				    const std::set<int>& changed) { }
-};
-
-#endif