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diff --git a/dep/src/zthread/State.h b/dep/src/zthread/State.h
deleted file mode 100644
index 6250f31599c..00000000000
--- a/dep/src/zthread/State.h
+++ /dev/null
@@ -1,152 +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 __ZTSTATE_H__
-#define __ZTSTATE_H__
-
-namespace ZThread {
-
-/**
- * @class State
- * @author Eric Crahen <http://www.code-foo.com>
- * @date <2003-07-16T20:04:01-0400>
- * @version 2.2.1
- *
- * Class to encapsulate the current state of the threads life-cycle.
- */
-class State {
- public:
-
-  //! Various states
-  typedef enum { REFERENCE, IDLE, RUNNING, JOINED } STATE;
-
-  /**
-   * Create State with the given flag set.
-   */
-  State(STATE initialState) : _state(initialState) {}
-
-  /**
-   * Test for the IDLE state. No task has yet run.
-   */
-  bool isIdle() const {
-    return _state == IDLE;
-  }
-
-  /**
-   * Test for the JOINED state. A task has completed and
-   * the thread is join()ed.
-   *
-   * @return bool
-   */
-  bool isJoined() const {
-    return _state == JOINED;
-  }
-
-  /**
-   * Test for the RUNNING state. A task is in progress.
-   *
-   * @return bool
-   */
-  bool isRunning() const {
-    return _state == RUNNING;
-  }
-
-  /**
-   * Test for the REFERENCE state. A task is in progress but not
-   * under control of this library.
-   *
-   * @return bool
-   */
-  bool isReference() const {
-    return _state == REFERENCE;
-  }
-
-  /**
-   * Transition to the IDLE state.
-   *
-   * @return bool true if successful
-   */
-  bool setIdle() {
-
-    if(_state != RUNNING)
-      return false;
-
-    _state = IDLE;
-    return true;
-
-  }
-
-  /**
-   * Transition to the RUNNING state.
-   *
-   * @return bool true if successful
-   */
-  bool setRunning() {
-
-    if(_state != IDLE)
-      return false;
-
-    _state = RUNNING;
-    return true;
-
-  }
-
-  /**
-   * Transition to the REFERENCE state.
-   *
-   * @return bool true if successful
-   */
-  bool setReference() {
-
-    if(_state != IDLE)
-      return false;
-
-    _state = REFERENCE;
-    return true;
-
-  }
-
-
-  /**
-   * Transition to the JOINED state.
-   *
-   * @return bool true if successful
-   */
-  bool setJoined() {
-
-    _state = JOINED;
-    return true;
-
-  }
-
- private:
-
-  //! Current state
-  STATE _state;
-
-};
-
-
-};
-
-#endif
-