remove dead code

      tb->deltasq6;

  }

}

/* ----------------------------------------------------------------------

   calculate potential u at distance x

   insure x is between bond min/max

------------------------------------------------------------------------- */

void BondTable::u_lookup(int type, double x, double &u)

{

  if (!std::isfinite(x)) {

    error->one(FLERR,"Illegal bond in bond style table");

  }

  double fraction,a,b;

  char estr[128];

  const Table *tb = &tables[tabindex[type]];

  const int itable = static_cast<int> ((x - tb->lo) * tb->invdelta);

  if (itable < 0) {

    sprintf(estr,"Bond length < table inner cutoff: "

            "type %d length %g",type,x);

    error->one(FLERR,estr);

  } else if (itable >= tablength) {

    sprintf(estr,"Bond length > table outer cutoff: "

            "type %d length %g",type,x);

    error->one(FLERR,estr);

  }

  if (tabstyle == LINEAR) {

    fraction = (x - tb->r[itable]) * tb->invdelta;

    u = tb->e[itable] + fraction*tb->de[itable];

  } else if (tabstyle == SPLINE) {

    fraction = (x - tb->r[itable]) * tb->invdelta;

    b = (x - tb->r[itable]) * tb->invdelta;

    a = 1.0 - b;

    u = a * tb->e[itable] + b * tb->e[itable+1] +

      ((a*a*a-a)*tb->e2[itable] + (b*b*b-b)*tb->e2[itable+1]) *

      tb->deltasq6;

  }

}