blockMesh: Removed the superfluous cellSet creation and write

Resolves bug-report https://bugs.openfoam.org/view.php?id=2960

applications/utilities/mesh/generation/blockMesh/blockMesh.C

@@ -57,7 +57,6 @@ Usage
 #include "polyTopoChange.H"
 #include "emptyPolyPatch.H"
 #include "cyclicPolyPatch.H"
-#include "cellSet.H"
 
 #include "argList.H"
 #include "OSspecific.H"
@@ -354,8 +353,6 @@ int main(int argc, char *argv[])
 
         List<cellZone*> cz(zoneMap.size());
 
-        Info<< nl << "Writing cell zones as cellSets" << endl;
-
         forAllConstIter(HashTable<label>, zoneMap, iter)
         {
             label zoneI = iter();
@@ -367,10 +364,6 @@ int main(int argc, char *argv[])
                 zoneI,
                 mesh.cellZones()
             );
-
-            // Write as cellSet for ease of processing
-            cellSet cset(mesh, iter.key(), zoneCells[zoneI].shrink());
-            cset.write();
         }
 
         mesh.pointZones().setSize(0);