Coding - Remove unused code and comments across various files (#968)

- Removed conditional compilation blocks (`#if 0`) that contained unused code in:
  - BRepTools_Modifier.cxx
  - AdvApp2Var_Data_f2c.hxx
  - AdvApp2Var_SysBase_baseinit.cxx
  - Extrema_FuncExtCS.cxx
  - Extrema_FuncExtSS.cxx
  - GeomProjLib.cxx
  - IntAna_IntLinTorus.cxx
  - IntAna2d_AnaIntersection_8.cxx
  - IntAna2d_Outils.cxx
  - ProjLib_CompProjectedCurve.cxx
  - ProjLib_ComputeApprox.cxx
  - ProjLib_ComputeApproxOnPolarSurface.cxx

- Cleaned up header files by ensuring proper end-of-file newlines in:
  - TKBRep_pch.hxx
  - GeomLib_Tool.hxx
  - MeshVS_SymmetricPairHasher.hxx
  - OpenGl_ShaderProgramDumpLevel.hxx
  - Graphic3d_ToneMappingMethod.hxx

src/ModelingData/TKGeomBase/AdvApp2Var/AdvApp2Var_Data_f2c.hxx

@@ -40,12 +40,6 @@ typedef long int  logical;
 typedef short int shortlogical;
 typedef char      logical1;
 typedef char      integer1;
-#if 0 /* Adjust for integer*8. */
-typedef long long longint;		/* system-dependent */
-typedef unsigned long long ulongint;	/* system-dependent */
-  #define qbit_clear(a, b) ((a) & ~((ulongint)1 << (b)))
-  #define qbit_set(a, b) ((a) | ((ulongint)1 << (b)))
-#endif
 
 #define TRUE_ (1)
 #define FALSE_ (0)

src/ModelingData/TKGeomBase/AdvApp2Var/AdvApp2Var_SysBase_baseinit.cxx

@@ -20,10 +20,6 @@ static int init_STBAS()
 {
   int ICODE = 0;
   // allocation tables are now local, so no global initialization is required
-#if 0
-  // Init du Tableau des allocs
-  AdvApp2Var_SysBase::mainial_();
-#endif
   // Init de LEC IBB IMP
   AdvApp2Var_SysBase::macinit_(&ICODE, &ICODE);
   //