continuing to clean up include file lists

src/pair_zbl.cpp

@@ -17,19 +17,10 @@
 
 #include "pair_zbl.h"
 #include <cmath>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
 #include "atom.h"
-#include "comm.h"
 #include "force.h"
 #include "neighbor.h"
 #include "neigh_list.h"
-#include "neigh_request.h"
-#include "update.h"
-#include "integrate.h"
-#include "respa.h"
-#include "math_const.h"
 #include "memory.h"
 #include "error.h"
 
@@ -37,7 +28,6 @@
 // "The Stopping and Range of Ions in Matter" volume 1, Pergamon, 1985.
 
 using namespace LAMMPS_NS;
-using namespace MathConst;
 using namespace PairZBLConstants;
 
 /* ---------------------------------------------------------------------- */