remove unneded mesh files from tutorial case

these files can be generated by a call to blockMesh

tutorials/cfdemSolverRhoPimple/ErgunTestMPI/CFD/constant/polyMesh/boundary

@@ -1,41 +0,0 @@
-/*--------------------------------*- C++ -*----------------------------------*\
-  =========                 |
-  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
-   \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Version:  6
-     \\/     M anipulation  |
-\*---------------------------------------------------------------------------*/
-FoamFile
-{
-    version     2.0;
-    format      ascii;
-    class       polyBoundaryMesh;
-    location    "constant/polyMesh";
-    object      boundary;
-}
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-3
-(
-    inlet
-    {
-        type            patch;
-        nFaces          192;
-        startFace       13248;
-    }
-    outlet
-    {
-        type            patch;
-        nFaces          192;
-        startFace       13440;
-    }
-    wall
-    {
-        type            wall;
-        inGroups        1(wall);
-        nFaces          768;
-        startFace       13632;
-    }
-)
-
-// ************************************************************************* //