delete useless methods in includes

include/hpp/fcl/BV/AABB.h

include/hpp/fcl/BV/BV.h

include/hpp/fcl/BV/OBB.h

include/hpp/fcl/BV/OBBRSS.h

include/hpp/fcl/BV/RSS.h

include/hpp/fcl/BV/kDOP.h

include/hpp/fcl/BV/kIOS.h

include/hpp/fcl/BVH/BVH_model.h

include/hpp/fcl/BVH/BVH_utility.h

include/hpp/fcl/math/matrix_3f.h

include/hpp/fcl/math/tools.h

include/hpp/fcl/math/transform.h

include/hpp/fcl/math/vec_3f.h

include/hpp/fcl/mesh_loader/assimp.h

include/hpp/fcl/mesh_loader/loader.h

test/test_fcl_eigen.cpp

test/test_fcl_geometric_shapes.cpp

test/test_fcl_gjk.cpp