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diff --git a/cras/src/server/cras_alert.h b/cras/src/server/cras_alert.h
deleted file mode 100644
index 7149a0b1..00000000
--- a/cras/src/server/cras_alert.h
+++ /dev/null
@@ -1,129 +0,0 @@
-/* Copyright (c) 2013 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 _CRAS_ALERT_H
-#define _CRAS_ALERT_H
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* The alert facility provides a way to signal the clients when a system state
- * changes.
- *
- * First the clients registers callbacks to an alert. Each time the system state
- * changes, we mark the associated alert as "pending". At the end of the event
- * loop, we invoke the callbacks for the pending alerts.
- *
- * We do this delayed callback to collapses multiple callbacks into one (for
- * example, if there are multiple nodes added at the same time, we will only
- * fire the "nodes changed" signal once).
- *
- * There is an optional "prepare" function which can be provided when creating
- * an alert. It is called before we invoke the callbacks. This gives the owner
- * of each alert a chance to update the system to a consistent state before
- * signalling the clients.
- *
- * The alert functions should only be used from the main thread.
- */
-
-struct cras_alert;
-
-/* Callback functions to be notified when settings change. arg is a user
- * provided argument that will be passed back, data is extra info about the
- * signal if available.
- */
-typedef void (*cras_alert_cb)(void *arg, void *data);
-typedef void (*cras_alert_prepare)(struct cras_alert *alert);
-
-/* Flags for alerts. */
-enum CRAS_ALERT_FLAGS {
-	/* By default, alerts will only keep the last copy of the data
-	 * specified in cras_alert_pending_data as an optimization - then
-	 * the callback is executed once with the latest value, rather than
-	 * for every value. In some cases, it is important to send the data
-	 * with every change. Use this flag to enable that behavior. */
-	CRAS_ALERT_FLAG_KEEP_ALL_DATA = 1 << 0,
-};
-
-/* Creates an alert.
- * Args:
- *    prepare - A function which will be called before calling the callbacks.
- *        The prepare function should update the system state in the shared
- *        memory to be consistent. It can be NULL if not needed.
- *    flags - 0 for defauts, or ORed values from enum CRAS_ALERT_FLAGS.
- * Returns:
- *    A pointer to the alert, NULL if out of memory.
- */
-struct cras_alert *cras_alert_create(cras_alert_prepare prepare,
-				     unsigned int flags);
-
-/* Adds a callback to the alert.
- * Args:
- *    alert - A pointer to the alert.
- *    cb - The callback.
- *    arg - will be passed to the callback when it is called.
- * Returns:
- *    0 on success or negative error code on failure.
- */
-int cras_alert_add_callback(struct cras_alert *alert, cras_alert_cb cb,
-			    void *arg);
-
-/* Removes a callback from the alert. It removes the callback if cb and arg
- * match a previously registered entry.
- * Args:
- *    alert - A pointer to the alert.
- *    cb - The callback.
- *    arg - will be passed to the callback when it is called.
- * Returns:
- *    0 on success or negative error code on failure.
- */
-int cras_alert_rm_callback(struct cras_alert *alert, cras_alert_cb cb,
-			   void *arg);
-
-/* Marks an alert as pending. We don't call the callbacks immediately when an
- * alert becomes pending, but will do that when
- * cras_alert_process_all_pending_alerts() is called.
- * Args:
- *    alert - A pointer to the alert.
- */
-void cras_alert_pending(struct cras_alert *alert);
-
-/* Marks an alert as pending. We don't call the callbacks immediately when an
- * alert becomes pending, but will do that when
- * cras_alert_process_all_pending_alerts() is called.
- * By default only the last data value supplied here is provided as an
- * argument to the callback. To have the callback executed with every
- * data value, call cras_alert_keep_all_data() (see above).
- * Args:
- *    alert - A pointer to the alert.
- *    data - A pointer to data that is copied and passed to the callback.
- *    data_size - Size of the data.
- */
-void cras_alert_pending_data(struct cras_alert *alert, void *data,
-			     size_t data_size);
-
-/* Processes all alerts that are pending.
- *
- * For all pending alerts, its prepare function will be called, then the
- * callbacks will be called. If any alert becomes pending during the callbacks,
- * the process will start again until no alert is pending.
- */
-void cras_alert_process_all_pending_alerts();
-
-/* Frees the resources used by an alert.
- * Args:
- *    alert - A pointer to the alert.
- */
-void cras_alert_destroy(struct cras_alert *alert);
-
-/* Frees the resources used by all alerts in the system. */
-void cras_alert_destroy_all();
-
-#ifdef __cplusplus
-} /* extern "C" */
-#endif
-
-#endif /* _CRAS_ALERT_H */