Replaced six.reraise with Python 3 syntax for re-raising

wagtail/contrib/modeladmin/views.py

@@ -1,5 +1,4 @@
 import operator
-import sys
 from collections import OrderedDict
 from functools import reduce
 
@@ -19,7 +18,6 @@ from django.db.models.fields.related import ForeignObjectRel, ManyToManyField
 from django.db.models.sql.constants import QUERY_TERMS
 from django.shortcuts import get_object_or_404, redirect
 from django.template.defaultfilters import filesizeformat
-from django.utils import six
 from django.utils.decorators import method_decorator
 from django.utils.encoding import force_text
 from django.utils.functional import cached_property
@@ -405,10 +403,7 @@ class IndexView(WMABaseView):
                 filter_specs, bool(filter_specs), lookup_params, use_distinct
             )
         except FieldDoesNotExist as e:
-            six.reraise(
-                IncorrectLookupParameters,
-                IncorrectLookupParameters(e),
-                sys.exc_info()[2])
+            raise IncorrectLookupParameters from e
 
     def get_query_string(self, new_params=None, remove=None):
         if new_params is None:

wagtail/embeds/finders/__init__.py

@@ -1,8 +1,6 @@
-import sys
 from importlib import import_module
 
 from django.utils.module_loading import import_string
-from django.utils import six
 from django.conf import settings
 
 
@@ -21,7 +19,7 @@ def import_finder_class(dotted_path):
         try:
             return import_string(dotted_path)
         except ImportError:
-            six.reraise(ImportError, e, sys.exc_info()[2])
+            raise ImportError from e
 
 
 def _get_config_from_settings():

wagtail/search/backends/__init__.py

@@ -2,10 +2,8 @@
 # Based on the Django cache framework
 # https://github.com/django/django/blob/5d263dee304fdaf95e18d2f0619d6925984a7f02/django/core/cache/__init__.py
 
-import sys
 from importlib import import_module
 
-from django.utils import six
 from django.utils.module_loading import import_string
 from django.core.exceptions import ImproperlyConfigured
 from django.conf import settings
@@ -46,7 +44,7 @@ def import_backend(dotted_path):
             # Old
             return import_string(dotted_path)
         except ImportError:
-            six.reraise(ImportError, e, sys.exc_info()[2])
+            raise ImportError from e
 
 
 def get_search_backend(backend='default', **kwargs):