[1.8.x] Fixed flake8 2.6 warnings.

Backport of ea34426ae7 from master

django/contrib/gis/db/backends/base/models.py

@@ -45,14 +45,14 @@ class SpatialRefSysMixin(object):
                 try:
                     self._srs = gdal.SpatialReference(self.wkt)
                     return self.srs
-                except Exception as msg:
-                    pass
+                except Exception as e:
+                    msg = e
 
                 try:
                     self._srs = gdal.SpatialReference(self.proj4text)
                     return self.srs
-                except Exception as msg:
-                    pass
+                except Exception as e:
+                    msg = e
 
                 raise Exception('Could not get OSR SpatialReference from WKT: %s\nError:\n%s' % (self.wkt, msg))
         else:

django/contrib/gis/db/models/sql/aggregates.py

@@ -1,10 +0,0 @@
-from django.db.models.sql import aggregates
-from django.db.models.sql.aggregates import *  # NOQA
-
-__all__ = ['Collect', 'Extent', 'Extent3D', 'MakeLine', 'Union'] + aggregates.__all__
-
-
-warnings.warn(
-    "django.contrib.gis.db.models.sql.aggregates is deprecated. Use "
-    "django.contrib.gis.db.models.aggregates instead.",
-    RemovedInDjango110Warning, stacklevel=2)

tests/servers/tests.py

@@ -99,12 +99,9 @@ class LiveServerViews(LiveServerBase):
         Ensure that the LiveServerTestCase serves 404s.
         Refs #2879.
         """
-        try:
+        with self.assertRaises(HTTPError) as err:
             self.urlopen('/')
-        except HTTPError as err:
-            self.assertEqual(err.code, 404, 'Expected 404 response')
-        else:
-            self.fail('Expected 404 response')
+        self.assertEqual(err.exception.code, 404, 'Expected 404 response')
 
     def test_view(self):
         """
@@ -128,12 +125,9 @@ class LiveServerViews(LiveServerBase):
         tries to access a static file that isn't explicitly put under
         STATIC_ROOT.
         """
-        try:
+        with self.assertRaises(HTTPError) as err:
             self.urlopen('/static/another_app/another_app_static_file.txt')
-        except HTTPError as err:
-            self.assertEqual(err.code, 404, 'Expected 404 response')
-        else:
-            self.fail('Expected 404 response (got %d)' % err.code)
+        self.assertEqual(err.exception.code, 404, 'Expected 404 response')
 
     def test_media_files(self):
         """