mv util/lp to math/lp

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

src/util/lp/indexer_of_constraints.h

@@ -1,45 +0,0 @@
-/*++
-Copyright (c) 2017 Microsoft Corporation
-
-Module Name:
-
-    <name>
-
-Abstract:
-
-    <abstract>
-
-Author:
-    Nikolaj Bjorner (nbjorner)
-    Lev Nachmanson (levnach)
-
-Revision History:
-
-
---*/
-
-#pragma once
-#include "util/lp/binary_heap_priority_queue.h"
-namespace lp {
-
-class indexer_of_constraints {
-    binary_heap_priority_queue<unsigned> m_queue_of_released_indices;
-    unsigned m_max;
-public:
-    indexer_of_constraints() :m_max(0) {}
-    unsigned get_new_index() {
-        unsigned ret;
-        if (m_queue_of_released_indices.is_empty()) {
-            ret = m_max++;
-        }
-        else {
-            ret = m_queue_of_released_indices.dequeue();
-        }
-        return ret;
-    };
-    void release_index(unsigned i) {
-        m_queue_of_released_indices.enqueue(i, i);
-    };
-    unsigned max() const { return m_max; }
-};
-}