fixed a potential bug

Signed-off-by: wiseaidev <[email protected]>

Author: wiseaidev

aredis_om/model/model.py

@@ -1207,11 +1207,6 @@ def to_string(s):
                 )
             )
 
-            try:
-                del fields["id"]
-            except KeyError:
-                pass
-
             try:
                 fields["json"] = fields["$"]
                 del fields["$"]