applications/utilities: Replaced fvCFD.H with appropriate include files

applications/utilities/postProcessing/graphics/ensightFoamReader/libuserd.C

@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2011-2018 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2023 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -38,12 +38,15 @@ Description
 
 #include <stdio.h>
 
-#include "fvCFD.H"
 #include "IOobjectList.H"
 #include "Cloud.H"
 #include "passiveParticle.H"
-#include "fvMesh.H"
+#include "volFields.H"
 #include "cellModeller.H"
+#include "OSspecific.H"
+
+using namespace Foam;
+
 #include "globalFoam.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //