Merge branch 'azure-2.0' into azure-2.1

Author: michiya

sql_server/pyodbc/base.py

@@ -207,13 +207,6 @@ def __init__(self, *args, **kwargs):
                     ops[op] = '%s COLLATE %s' % (sql, collation)
             self.operators.update(ops)
 
-        self.features = DatabaseFeatures(self)
-        self.ops = DatabaseOperations(self)
-        self.client = DatabaseClient(self)
-        self.creation = DatabaseCreation(self)
-        self.introspection = DatabaseIntrospection(self)
-        self.validation = BaseDatabaseValidation(self)
-
     def create_cursor(self, name=None):
         return CursorWrapper(self.connection.cursor(), self)
 
@@ -372,10 +365,6 @@ def is_usable(self):
         else:
             return True
 
-    def schema_editor(self, *args, **kwargs):
-        "Returns a new instance of this backend's SchemaEditor"
-        return DatabaseSchemaEditor(self, *args, **kwargs)
-
     @cached_property
     def sql_server_version(self, _known_versions={}):
         """