Remove clean_copy function from pair_vashishta_kokkos

src/KOKKOS/pair_vashishta_kokkos.cpp

@@ -114,7 +114,6 @@ void PairVashishtaKokkos<DeviceType>::compute(int eflag_in, int vflag_in)
   d_numneigh = k_list->d_numneigh;
   d_neighbors = k_list->d_neighbors;
 
-  k_list->clean_copy();
   copymode = 1;
 
   EV_FLOAT ev;