Remove Vec3f::length and Vec3f sqrLength

include/hpp/fcl/BV/AABB.h

include/hpp/fcl/BV/BV.h

include/hpp/fcl/BV/OBB.h

include/hpp/fcl/BV/kIOS.h

include/hpp/fcl/BVH/BVH_model.h

include/hpp/fcl/ccd/motion.h

include/hpp/fcl/eigen/vec_3fx.h

include/hpp/fcl/math/vec_3fx.h

include/hpp/fcl/math/vec_nf.h

include/hpp/fcl/narrowphase/narrowphase.h

include/hpp/fcl/octree.h

include/hpp/fcl/shape/geometric_shapes.h

src/BV/OBB.cpp

src/BV/RSS.cpp

src/BV/kIOS.cpp

src/BVH/BVH_model.cpp

src/BVH/BVH_utility.cpp

src/BVH/BV_fitter.cpp

src/ccd/motion.cpp

src/collision_func_matrix.cpp