Remove unrequired cast

Author: m-kuhn

python/plugins/db_manager/db_plugins/connector.py

@@ -80,7 +80,7 @@ def _execute(self, cursor, sql):
         if cursor is None:
             cursor = self._get_cursor()
         try:
-            cursor.execute(str(sql))
+            cursor.execute(sql)
 
         except self.connection_error_types() as e:
             raise ConnectionError(e)