Remove deprecrated method setPointSize

src/docs/asciidoc/jme3/advanced/custom_meshes.adoc

@@ -321,7 +321,6 @@ Additionally to coloring the faces as just described, you can hide the faces and
 Geometry coloredMesh = new Geometry ("ColoredMesh", cMesh);
 ...
 mesh.setMode(Mesh.Mode.Points);
-mesh.setPointSize(10f);
 mesh.updateBound();
 mesh.setStatic();
 Geometry points = new Geometry("Points", mesh);