Update certifi to 2019.03.09

lib/certifi/core.py

@@ -1,4 +1,3 @@
-#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
 """
@@ -8,30 +7,9 @@ certifi.py
 This module returns the installation location of cacert.pem.
 """
 import os
-import warnings
-
-
-class DeprecatedBundleWarning(DeprecationWarning):
-    """
-    The weak security bundle is being deprecated. Please bother your service
-    provider to get them to stop using cross-signed roots.
-    """
 
 
 def where():
     f = os.path.dirname(__file__)
 
     return os.path.join(f, 'cacert.pem')
-
-
-def old_where():
-    warnings.warn(
-        "The weak security bundle is being deprecated. It will be removed in "
-        "2018.",
-        DeprecatedBundleWarning
-    )
-    f = os.path.dirname(__file__)
-    return os.path.join(f, 'weak.pem')
-
-if __name__ == '__main__':
-    print(where())