remove some warnings

6 jobs for pr/16 in 5 minutes and 14 seconds (queued for 7 seconds)
Status Name Job ID Coverage
  Test
passed doc-coverage #132687

00:00:38

65.0%
passed format #132688

00:00:07

passed robotpkg-py-hpp-centroidal-dynamics-18.04 #132683

00:00:19

passed robotpkg-py-hpp-centroidal-dynamics-20.04 #132684

00:00:29

passed robotpkg-py-hpp-centroidal-dynamics-buster #132685

00:00:24

passed robotpkg-py-hpp-centroidal-dynamics-ferrum #132686

00:05:14