Remove unnecessary function prototypes from the serial_io.h and single_io.h

src/serial_io.h

@@ -50,13 +50,6 @@ void write_output_serial(struct engine* e, const char* baseName,
                          const struct unit_system* snapshot_units, int mpi_rank,
                          int mpi_size, MPI_Comm comm, MPI_Info info);
 
-void writeArray(const struct engine* e, hid_t grp, char* fileName,
-                FILE* xmfFile, char* partTypeGroupName,
-                const struct io_props props, size_t N, long long N_total,
-                int mpi_rank, long long offset,
-                const struct unit_system* internal_units,
-                const struct unit_system* snapshot_units);
-
 #endif /* HAVE_HDF5 && WITH_MPI && !HAVE_PARALLEL_HDF5 */
 
 #endif /* SWIFT_SERIAL_IO_H */

src/single_io.h

@@ -44,12 +44,6 @@ void write_output_single(struct engine* e, const char* baseName,
                          const struct unit_system* internal_units,
                          const struct unit_system* snapshot_units);
 
-void writeArray(const struct engine* e, hid_t grp, char* fileName,
-                FILE* xmfFile, char* partTypeGroupName,
-                const struct io_props props, size_t N,
-                const struct unit_system* internal_units,
-                const struct unit_system* snapshot_units);
-
 #endif /* HAVE_HDF5 && !WITH_MPI */
 
 #endif /* SWIFT_SINGLE_IO_H */