diff --git a/swh/core/config.py b/swh/core/config.py
index c0b05c6..768ecc1 100644
--- a/swh/core/config.py
+++ b/swh/core/config.py
@@ -1,57 +1,55 @@
-#!/usr/bin/env python3
-
 # Copyright (C) 2015  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
 import configparser
 import os
 
 
 # conversion per type
 _map_convert_fn = {
     'int': int,
     'bool': lambda x: x.lower() == 'true',
 }
 
 
 def read(conf_file, default_conf=None):
     """Read the user's configuration file.
     Fill in the gap using `default_conf`.
 `default_conf` is similar to this:
 DEFAULT_CONF = {
     'a': ('string', '/tmp/swh-loader-git/log'),
     'b': ('string', 'dbname=swhloadergit')
     'c': ('bool', true)
     'e': ('bool', None)
     'd': ('int', 10)
 }
 
     """
     config = configparser.ConfigParser(defaults=default_conf)
     config.read(os.path.expanduser(conf_file))
     conf = config._sections['main']
 
     # remaining missing default configuration key are set
     # also type conversion is enforced for underneath layer
     for key in default_conf:
         nature_type, default_value = default_conf[key]
         val = conf.get(key, None)
         if not val:  # fallback to default value
             conf[key] = default_value
         else:  # value present but in string format, force type conversion
             conf[key] = _map_convert_fn.get(nature_type, lambda x: x)(val)
 
     return conf
 
 
 def prepare_folders(conf, *keys):
     """Prepare the folder mentioned in config under keys.
     """
     def makedir(folder):
         if not os.path.exists(folder):
             os.makedirs(folder)
 
     for key in keys:
         makedir(conf[key])