diff --git a/src/cooling/grackle/grackle_wrapper.c b/src/cooling/grackle/grackle_wrapper.c
deleted file mode 100644
index a277638788c309a9dd8ab97c56704361fd598f98..0000000000000000000000000000000000000000
--- a/src/cooling/grackle/grackle_wrapper.c
+++ /dev/null
@@ -1,104 +0,0 @@
-/***********************************************************************
-/
-/ Grackle c wrapper
-/
-/
-/ Copyright (c) 2013, Enzo/Grackle Development Team.
-/
-/ Distributed under the terms of the Enzo Public Licence.
-/
-/ The full license is in the file LICENSE, distributed with this
-/ software.
-************************************************************************/
-
-#include "grackle_wrapper.h"
-
-#ifdef SWIFT_DEBUG_CHECKS
-#include <assert.h>
-#define GRACKLE_ASSERT(X) assert((X))
-#else
-#define GRACKLE_ASSERT(X)
-#endif
-
-code_units my_units;
-
-// arrays passed to grackle as input and to be filled
-#define FIELD_SIZE 1
-
-gr_float HDI_density[FIELD_SIZE];
-
-// Set grid dimension and size.
-// grid_start and grid_end are used to ignore ghost zones.
-const int grid_rank = 1;
-
-int wrap_get_cooling_time(double rho, double u, double Z, double a_now,
-                          double *coolingtime) {
-  gr_float den_factor = 1.0;
-  gr_float u_factor = 1.0;
-
-  gr_float x_velocity[FIELD_SIZE] = {0.0};
-  gr_float y_velocity[FIELD_SIZE] = {0.0};
-  gr_float z_velocity[FIELD_SIZE] = {0.0};
-
-  gr_float density[FIELD_SIZE] = {rho * den_factor};
-  gr_float metal_density[FIELD_SIZE] = {Z * density[0]};
-  gr_float energy[FIELD_SIZE] = {u * u_factor};
-
-  gr_float cooling_time[FIELD_SIZE] = {0.0};
-
-  int grid_dimension[3] = {1, 0, 0};
-  int grid_start[3] = {0, 0, 0};
-  int grid_end[3] = {0, 0, 0};
-
-  if (FIELD_SIZE != 1) {
-    error("field_size must currently be set to 1.");
-  }
-
-  if (calculate_cooling_time_table(&my_units, a_now, grid_rank, grid_dimension,
-                                   grid_start, grid_end, density, energy,
-                                   x_velocity, y_velocity, z_velocity,
-                                   metal_density, cooling_time) == 0) {
-    error("Error in calculate_cooling_time.");
-  }
-
-  // return updated chemistry and energy
-  for (int i = 0; i < FIELD_SIZE; i++) {
-    coolingtime[i] = cooling_time[i];
-  }
-
-  return 1;
-}
-
-int wrap_do_cooling(double rho, double *u, double dt, double Z, double a_now) {
-
-  GRACKLE_ASSERT(FIELD_SIZE == 1);
-
-  gr_float den_factor = 1.0;
-  gr_float u_factor = 1.0;
-
-  gr_float x_velocity[FIELD_SIZE] = {0.0};
-  gr_float y_velocity[FIELD_SIZE] = {0.0};
-  gr_float z_velocity[FIELD_SIZE] = {0.0};
-
-  gr_float density[FIELD_SIZE] = {rho * den_factor};
-  gr_float metal_density[FIELD_SIZE] = {Z * density[0]};
-  gr_float energy[FIELD_SIZE] = {(*u) * u_factor};
-
-  int grid_dimension[3] = {1, 0, 0};
-  int grid_start[3] = {0, 0, 0};
-  int grid_end[3] = {0, 0, 0};
-
-  if (solve_chemistry_table(&my_units, a_now, dt, grid_rank, grid_dimension,
-                            grid_start, grid_end, density, energy, x_velocity,
-                            y_velocity, z_velocity, metal_density) == 0) {
-    error("Error in solve_chemistry.");
-    return 0;
-  }
-  // return updated chemistry and energy
-  for (int i = 0; i < FIELD_SIZE; i++) {
-    u[i] = energy[i] / u_factor;
-  }
-
-  return 1;
-}
-
diff --git a/src/cooling/grackle/grackle_wrapper.h b/src/cooling/grackle/grackle_wrapper.h
deleted file mode 100644
index 10c8b793ccd7785e899a97b7602cd3995e42bb20..0000000000000000000000000000000000000000
--- a/src/cooling/grackle/grackle_wrapper.h
+++ /dev/null
@@ -1,48 +0,0 @@
-/***********************************************************************
-/
-/ Grackle c wrapper
-/
-/
-/ Copyright (c) 2013, Enzo/Grackle Development Team.
-/
-/ Distributed under the terms of the Enzo Public Licence.
-/
-/ The full license is in the file LICENSE, distributed with this
-/ software.
-************************************************************************/
-#ifndef SWIFT_COOLING_GRACKLE_WRAPPER_H
-#define SWIFT_COOLING_GRACKLE_WRAPPER_H
-
-#include "config.h"
-#include "error.h"
-
-#include <chemistry_data.h>
-#include <grackle.h>
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "config.h"
-#include "error.h"
-
-int wrap_init_cooling(char *CloudyTable, int UVbackground, double udensity,
-                      double ulength, double utime, int grackle_chemistry);
-
-int wrap_init_cooling(char *CloudyTable, int UVbackground, double udensity,
-                      double ulength, double utime, int grackle_chemistry);
-
-int wrap_set_UVbackground_on();
-
-int wrap_set_UVbackground_off();
-
-int wrap_get_cooling_time(double rho, double u, double Z, double a_now,
-                          double *coolingtime);
-
-int wrap_do_cooling(double density, double *energy, double dtime, double Z,
-                    double a_now);
-
-void grackle_print_data();
-
-void cloudy_print_data(const cloudy_data c, const int print_mmw);
-
-#endif /* SWIFT_COOLING_GRACKLE_WRAPPER_H */