Remove unneeded comments

Author: clenk

sdv/validators/stix/best_practice.py

@@ -1192,7 +1192,6 @@ def can_run(stix_version, rule_min, rule_max):
 
             return min_ver <= doc_ver
 
-        #StrictVersion = distutils.version.StrictVersion
         all_rules = self._rules.items()  # noqa
 
         # Get a generator which yields all best practice methods that are

sdv/validators/stix/common.py

@@ -4,7 +4,6 @@
 # builtin
 import re
 import functools
-# from distutils.version import StrictVersion
 from packaging.version import parse as parse_version
 
 # external

sdv/validators/xml_schema.py

@@ -15,7 +15,6 @@
 from . import base
 
 
-#@python_2_unicode_compatible
 class XmlSchemaError(base.ValidationError):
     """Represents an XML Schema validation error.