change coulomb example to use cutoff coulomb

examples/python/in.pair_python_coulomb

@@ -3,14 +3,11 @@ atom_style	full
 
 read_data	data.spce
 
-pair_style	hybrid/overlay coul/long 12.0 python 12.0
-kspace_style	pppm 1.0e-6
+pair_style	hybrid/overlay coul/cut 12.0 python 12.0
 
-pair_coeff	* * coul/long
+pair_coeff	* * coul/cut
 pair_coeff	* * python py_pot.LJCutSPCE OW NULL
 
-pair_modify     table 0
-
 bond_style	harmonic
 angle_style	harmonic
 dihedral_style	none