message: Removed chronic import.
diff: @@ -31,8 +31,6 @@ from dscribe.descriptors import Descriptor
  from dscribe.libmbtr.mbtrwrapper import MBTRWrapper
  import dscribe.utils.geometry
  -import chronic
  -
  class MBTR(Descriptor):
  """Implementation of the Many-body tensor representation up to :math:`k=3`.
  