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diff --git a/dep/include/zthread/Semaphore.h b/dep/include/zthread/Semaphore.h
deleted file mode 100644
index 3ea1dba4e16..00000000000
--- a/dep/include/zthread/Semaphore.h
+++ /dev/null
@@ -1,151 +0,0 @@
-/*
- * Copyright (c) 2005, Eric Crahen
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is furnished
- * to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- */
-
-#ifndef __ZTSEMAPHORE_H__
-#define __ZTSEMAPHORE_H__
-
-#include "zthread/Lockable.h"
-#include "zthread/NonCopyable.h"
-
-namespace ZThread {
-
-  class FifoSemaphoreImpl;
-
-  /**
-   * @class Semaphore
-   * @author Eric Crahen <http://www.code-foo.com>
-   * @date <2003-07-16T15:28:01-0400>
-   * @version 2.2.1
-   *
-   * A Semaphore is an owner-less Lockable object. Its probably best described as
-   * a set of 'permits'. A Semaphore is initialized with an initial count and
-   * a maximum count, these would correspond to the number of 'permits' currently
-   * available and the number of' permits' in total.
-   *
-   * - Acquiring the Semaphore means taking a permit, but if there are none
-   *   (the count is 0) the Semaphore will block the calling thread.
-   *
-   * - Releasing the Semaphore means returning a permit, unblocking a thread
-   *   waiting for one.
-   *
-   * A Semaphore with an initial value of 1 and maximum value of 1 will act as
-   * a Mutex.
-   *
-   * Threads blocked on a Semaphore are resumed in FIFO order.
-   *
-   */
-  class ZTHREAD_API Semaphore : public Lockable, private NonCopyable {
-
-    FifoSemaphoreImpl* _impl;
-
-  public:
-
-    /**
-     * Create a new Semaphore.
-     *
-     * @param count initial count
-     * @param maxCount maximum count
-     */
-    Semaphore(int count = 1, unsigned int maxCount = 1);
-
-    //! Destroy the Semaphore
-    virtual ~Semaphore();
-
-    /**
-     * <i>Provided to reflect the traditional Semaphore semantics</i>
-     *
-     * @see acquire()
-     */
-    void wait();
-
-
-    /**
-     * <i>Provided to reflect the traditional Semaphore semantics</i>
-     *
-     * @see tryAcquire(unsigned long timeout)
-     */
-    bool tryWait(unsigned long timeout);
-
-    /**
-     * <i>Provided to reflect the traditional Semaphore semantics</i>
-     *
-     * @see release()
-     */
-    void post();
-
-
-    /**
-     * Get the current count of the semaphore.
-     *
-     * This value may change immediately after this function returns to the calling thread.
-     *
-     * @return <em>int</em> count
-     */
-    virtual int count();
-
-    /**
-     * Decrement the count, blocking that calling thread if the count becomes 0 or
-     * less than 0. The calling thread will remain blocked until the count is
-     * raised above 0, an exception is thrown or the given amount of time expires.
-     *
-     * @param timeout maximum amount of time (milliseconds) this method could block
-     *
-     * @return
-     *   - <em>true</em> if the Semaphore was acquired before <i>timeout</i> milliseconds elapse.
-     *   - <em>false</em> otherwise.
-     *
-     * @exception Interrupted_Exception thrown when the calling thread is interrupted.
-     *            A thread may be interrupted at any time, prematurely ending any wait.
-     *
-     * @see Lockable::tryAcquire(unsigned long timeout)
-     */
-    virtual bool tryAcquire(unsigned long timeout);
-
-
-    /**
-     * Decrement the count, blocking that calling thread if the count becomes 0 or
-     * less than 0. The calling thread will remain blocked until the count is
-     * raised above 0 or if an exception is thrown.
-     *
-     * @exception Interrupted_Exception thrown when the calling thread is interrupted.
-     *            A thread may be interrupted at any time, prematurely ending any wait.
-     *
-     * @see Lockable::acquire()
-     */
-    virtual void acquire();
-
-    /**
-     * Increment the count, unblocking one thread if count is positive.
-     *
-     * @exception InvalidOp_Exception thrown if the maximum count would be exceeded.
-     *
-     * @see Lockable::release()
-     */
-    virtual void release();
-
-  };
-
-
-} // namespace ZThread
-
-#endif // __ZTSEMAPHORE_H__
-