public release 4.2.0 - see README.md and CHANGES.md for details

pmsco/optimizers/swarm.py

@@ -10,20 +10,16 @@ D. A. Duncan et al., Surface Science 606, 278 (2012)
 
 @author Matthias Muntwiler, matthias.muntwiler@psi.ch
 
-@copyright (c) 2015-18 by Paul Scherrer Institut @n
+@copyright (c) 2015-21 by Paul Scherrer Institut @n
 Licensed under the Apache License, Version 2.0 (the "License"); @n
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at
   http://www.apache.org/licenses/LICENSE-2.0
 """
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 import logging
 import numpy as np
 import pmsco.optimizers.population as population
-from pmsco.helpers import BraceMessage as BMsg
 
 logger = logging.getLogger(__name__)