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diff --git a/src/options/decision_mode.h b/src/options/decision_mode.h
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-/*********************                                                        */
-/*! \file decision_mode.h
- ** \verbatim
- ** Top contributors (to current version):
- **   Kshitij Bansal, Morgan Deters, Tim King
- ** This file is part of the CVC4 project.
- ** Copyright (c) 2009-2019 by the authors listed in the file AUTHORS
- ** in the top-level source directory) and their institutional affiliations.
- ** All rights reserved.  See the file COPYING in the top-level source
- ** directory for licensing information.\endverbatim
- **
- ** \brief [[ Add one-line brief description here ]]
- **
- ** [[ Add lengthier description here ]]
- ** \todo document this file
- **/
-
-#include "cvc4_private.h"
-
-#ifndef CVC4__SMT__DECISION_MODE_H
-#define CVC4__SMT__DECISION_MODE_H
-
-#include <iosfwd>
-
-namespace CVC4 {
-namespace decision {
-
-/** Enumeration of decision strategies */
-enum DecisionMode {
-
-  /**
-   * Decision engine doesn't do anything. Use sat solver's internal
-   * heuristics
-   */
-  DECISION_STRATEGY_INTERNAL,
-
-  /**
-   * Use the justification heuristic
-   */
-  DECISION_STRATEGY_JUSTIFICATION,
-
-  /**
-   * Use may-relevancy.
-   */
-  DECISION_STRATEGY_RELEVANCY
-
-};/* enum DecisionMode */
-
-
-/** Enumeration of combining functions for computing internal weights */
-enum DecisionWeightInternal {
-  DECISION_WEIGHT_INTERNAL_OFF,
-  DECISION_WEIGHT_INTERNAL_MAX,
-  DECISION_WEIGHT_INTERNAL_SUM,
-  DECISION_WEIGHT_INTERNAL_USR1
-};/* enum DecisionInternalWeight */
-
-}/* CVC4::decision namespace */
-
-std::ostream& operator<<(std::ostream& out, decision::DecisionMode mode);
-
-}/* CVC4 namespace */
-
-#endif /* CVC4__SMT__DECISION_MODE_H */