tutorials: Removed 0.orig directories in favor of <field>.orig

The new automated <field>.orig reading has made 0.orig directories and
associated scripting redundant.

tutorials/mesh/foamyQuadMesh/OpenCFD/Allclean

@@ -6,7 +6,6 @@ cd ${0%/*} || exit 1    # Run from this directory
 
 rm -rf constant/extendedFeatureEdgeMesh > /dev/null 2>&1
 rm -rf constant/triSurface/*.eMesh > /dev/null 2>&1
-rm -rf 0 > /dev/null 2>&1
 rm -rf MeshedSurface.obj > /dev/null 2>&1
 
 cleanCase

tutorials/mesh/foamyQuadMesh/OpenCFD/Allrun

@@ -11,5 +11,4 @@ runApplication foamyQuadMesh -overwrite
 runApplication extrude2DMesh -overwrite polyMesh2D
 runApplication checkMesh -allGeometry -allTopology -constant -noZero
 
-
 #------------------------------------------------------------------------------

tutorials/mesh/foamyQuadMesh/OpenCFD/Allrun-rhoCentralFoam

@@ -5,11 +5,9 @@ cd ${0%/*} || exit 1    # Run from this directory
 . $WM_PROJECT_DIR/bin/tools/RunFunctions
 
 cp system/controlDict.rhoCentralFoam system/controlDict
-cp -r 0.orig 0
 
 runApplication decomposePar
 runParallel rhoCentralFoam
 runApplication reconstructPar
 
-
 #------------------------------------------------------------------------------