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diff --git a/sim/sim_time.hh b/sim/sim_time.hh
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--- a/sim/sim_time.hh
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@@ -1,90 +0,0 @@
-/*
- * Copyright (c) 2003 The Regents of The University of Michigan
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met: redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer;
- * redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution;
- * neither the name of the copyright holders nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef __SIM_TIME_HH__
-#define __SIM_TIME_HH__
-
-#include <sys/time.h>
-
-#include <iosfwd>
-
-namespace Time {
-    struct _timeval;
-    class Start
-    {
-      private:
-        mutable _timeval *start;
-
-      public:
-        Start();
-        ~Start();
-
-        const timeval &get() const;
-        void reset();
-        double operator()() const;
-    };
-
-    class Now
-    {
-      private:
-        mutable _timeval *now;
-
-      public:
-        Now();
-        ~Now();
-
-        const timeval &get() const;
-        double operator()() const;
-    };
-
-    class Elapsed
-    {
-      private:
-        mutable _timeval *elapsed;
-        Start _start;
-        Now _now;
-
-      public:
-        Elapsed();
-        ~Elapsed();
-
-        const timeval &get() const;
-        void reset();
-        double operator()() const;
-    };
-
-    extern Start start;
-    extern Now now;
-    extern Elapsed elapsed;
-
-    std::ostream &operator<<(std::ostream &out, const Start &start);
-    std::ostream &operator<<(std::ostream &out, const Now &now);
-    std::ostream &operator<<(std::ostream &out, const Elapsed &elapsed);
-}
-
-#endif // __SIM_TIME_HH__