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diff --git a/src/EigenUnsupported/CXX11/src/ThreadPool/ThreadPoolInterface.h b/src/EigenUnsupported/CXX11/src/ThreadPool/ThreadPoolInterface.h
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@@ -1,48 +0,0 @@
-// This file is part of Eigen, a lightweight C++ template library
-// for linear algebra.
-//
-// Copyright (C) 2014 Benoit Steiner <benoit.steiner.goog@gmail.com>
-//
-// This Source Code Form is subject to the terms of the Mozilla
-// Public License v. 2.0. If a copy of the MPL was not distributed
-// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-#ifndef EIGEN_CXX11_THREADPOOL_THREAD_POOL_INTERFACE_H
-#define EIGEN_CXX11_THREADPOOL_THREAD_POOL_INTERFACE_H
-
-namespace Eigen {
-
-// This defines an interface that ThreadPoolDevice can take to use
-// custom thread pools underneath.
-class ThreadPoolInterface {
- public:
- // Submits a closure to be run by a thread in the pool.
- virtual void Schedule(std::function<void()> fn) = 0;
-
- // Submits a closure to be run by threads in the range [start, end) in the
- // pool.
- virtual void ScheduleWithHint(std::function<void()> fn, int /*start*/,
- int /*end*/) {
- // Just defer to Schedule in case sub-classes aren't interested in
- // overriding this functionality.
- Schedule(fn);
- }
-
- // If implemented, stop processing the closures that have been enqueued.
- // Currently running closures may still be processed.
- // If not implemented, does nothing.
- virtual void Cancel() {}
-
- // Returns the number of threads in the pool.
- virtual int NumThreads() const = 0;
-
- // Returns a logical thread index between 0 and NumThreads() - 1 if called
- // from one of the threads in the pool. Returns -1 otherwise.
- virtual int CurrentThreadId() const = 0;
-
- virtual ~ThreadPoolInterface() {}
-};
-
-} // namespace Eigen
-
-#endif // EIGEN_CXX11_THREADPOOL_THREAD_POOL_INTERFACE_H