diff --git a/applications/utilities/postProcessing/dataConversion/hashSetUnion.H b/applications/utilities/postProcessing/dataConversion/hashSetUnion.H
deleted file mode 100644
index 0651431f1283d53e24f788edaf5e975051a947cc..0000000000000000000000000000000000000000
--- a/applications/utilities/postProcessing/dataConversion/hashSetUnion.H
+++ /dev/null
@@ -1,53 +0,0 @@
-/*---------------------------------------------------------------------------*\
-  =========                 |
-  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
-   \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 1991-2009 OpenCFD Ltd.
-     \\/     M anipulation  |
--------------------------------------------------------------------------------
-License
-    This file is part of OpenFOAM.
-
-    OpenFOAM is free software; you can redistribute it and/or modify it
-    under the terms of the GNU General Public License as published by the
-    Free Software Foundation; either version 2 of the License, or (at your
-    option) any later version.
-
-    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
-    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-    for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with OpenFOAM; if not, write to the Free Software Foundation,
-    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
-Class
-    Foam::hashSetUnionEqOp
-
-Description
-    Union operation to combine hash sets
-    Usage: combineReduce(myWordHashSet, unionEqOp<word>());
-
-\*---------------------------------------------------------------------------*/
-
-namespace Foam
-{
-    template<class Type>
-    class hashSetUnionEqOp
-    {
-        public:
-        void operator()(HashSet<Type>& x, const HashSet<Type>& y) const
-        {
-            forAllConstIter(typename HashSet<Type>, y, iter)
-            {
-                x.insert(iter.key());
-            }
-        }
-    };
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-} // End namespace Foam
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
diff --git a/applications/utilities/postProcessing/dataConversion/hashTableUnion.H b/applications/utilities/postProcessing/dataConversion/hashTableUnion.H
deleted file mode 100644
index a8aa3be587f9997d351bd15a002f87765e4fa5a8..0000000000000000000000000000000000000000
--- a/applications/utilities/postProcessing/dataConversion/hashTableUnion.H
+++ /dev/null
@@ -1,53 +0,0 @@
-/*---------------------------------------------------------------------------*\
-  =========                 |
-  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
-   \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 1991-2009 OpenCFD Ltd.
-     \\/     M anipulation  |
--------------------------------------------------------------------------------
-License
-    This file is part of OpenFOAM.
-
-    OpenFOAM is free software; you can redistribute it and/or modify it
-    under the terms of the GNU General Public License as published by the
-    Free Software Foundation; either version 2 of the License, or (at your
-    option) any later version.
-
-    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
-    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-    for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with OpenFOAM; if not, write to the Free Software Foundation,
-    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
-Class
-    Foam::hashTableUnionEqOp
-
-Description
-    Union operation to combine hash sets
-    Usage: combineReduce(myWordHashSet, unionEqOp<word>());
-
-\*---------------------------------------------------------------------------*/
-
-namespace Foam
-{
-    template<class Type>
-    class hashTableUnionEqOp
-    {
-        public:
-        void operator()(HashTable<Type>& x, const HashTable<Type>& y) const
-        {
-            forAllConstIter(typename HashTable<Type>, y, iter)
-            {
-                x.insert(iter.key(), iter());
-            }
-        }
-    };
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-} // End namespace Foam
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //