rename file in .hpp, but file is not used

Src/Kernels/Chebyshev/FChebInterface.h

-// See LICENCE file at project root
-
-/**
- * This file provide an interface to the Chebyshev kernel, in order to
- * call it from C code (and thus use it through API's user defined
- * kernel feature).
- */
-
-#ifndef FCHEBINTERFACE_H
-#define FCHEBINTERFACE_H
-#include "Utils/FGlobal.hpp"
-
-//To access leaf datas
-struct FChebLeaf_struct;
-typedef struct FChebLeaf_struct ChebLeafStruct;
-
-//To access a cell
-struct FChebCell_struct;
-typedef struct FChebCell_struct ChebCellStruct;
-ChebCellStruct * ChebCellStruct_create(long long int index,int * tree_position);
-void ChebCellStruct_free(ChebCellStruct * cell);
-
-//To manage leaves
-ChebLeafStruct * ChebLeafStruct_create(FSize nbPart);
-void ChebLeafStruct_free(void * leafData);
-void ChebLeafStruct_fill(FSize nbPart, const FSize * idxPart,
-                         long long morton_index, void * leafData,
-                         void * userData);
-
-void ChebLeafStruct_get_back_results(void * leafData,
-                                     double ** forceXptr,  double ** forceYptr,  double ** forceZptr,
-                                     double ** potentialsptr);
-
-//To access the kernel
-struct FChebKernel_struct;
-typedef struct FChebKernel_struct ChebKernelStruct;
-ChebKernelStruct * ChebKernelStruct_create(int inTreeHeight,
-                                           double inBoxWidth,
-                                           double* inBoxCenter);
-
-void ChebKernelStruct_free(void * kernel);
-//To access kernel member function
-
-void ChebKernel_P2M(void * leafCell, void * leafData, FSize nbParticles,const FSize* particleIndexes, void* kernel);
-void ChebKernel_M2M(int level, void* parentCell, int childPosition, void* childCell, void* kernel);
-//Change here to somethong nearer M2L defined in Src/Components/FAbstractKernels.hpp
-void ChebKernel_M2L(int level, void* targetCell,const int*neighborPositions,int size, void** sourceCell, void* kernel);
-void ChebKernel_L2L(int level, void* parentCell, int childPosition, void* childCell, void* kernel);
-void ChebKernel_L2P(void* leafCell, void * leafData, FSize nbParticles, const FSize* particleIndexes, void* kernel);
-void ChebKernel_P2P(void * targetLeaf, FSize nbParticles, const FSize* particleIndexes,
-                    void ** sourceLeaves,
-                    const FSize ** sourceParticleIndexes, FSize * sourceNbPart,
-                    const int * sourcePosition,const int size,void* userData);
-void ChebKernel_P2P_old(void * targetLeaf, FSize nbParticles, const FSize* particleIndexes,
-                        void ** sourceLeaves,
-                        const FSize ** sourceParticleIndexes,FSize* sourceNbPart,
-                        const int * sourcePosition,const int size, void* inKernel);
-
-void ChebKernel_P2PRemote(void * targetLeaf,FSize nbParticles, const FSize* particleIndexes,
-                          void ** sourceLeaves,
-                          const FSize ** sourceParticleIndexes,FSize * sourceNbPart,
-                          const int * sourcePosition, const int size, void* inKernel);
-
-void ChebCell_reset(int level, long long morton_index, int* tree_position, double* spatial_position, void * userCell, void * kernel);
-
-FSize ChebCell_getSize(int level, long long morton_index);
-
-void ChebCell_copy(void * userDatas, FSize size, void * memoryAllocated);
-
-void* ChebCell_restore(int level, void * arrayTobeRead);
-
-FSize ChebLeaf_getSize(FSize nbPart);
-
-void ChebLeaf_copy(FSize nbPart,void * userdata, void * memAllocated);
-
-void * ChebLeaf_restore(FSize nbPart,void * memToRead);
-
-typedef struct myUserDatas{
-    ChebKernelStruct * kernelStruct;
-    double * insertedPositions;
-    double * myPhyValues;
-    double ** forcesComputed;
-    //In the same way we store multiples forces array.
-    double ** potentials;
-    double totalEnergy;
-}UserData;
-
-
-#endif //FCHEBINTERFACE_H