remove misleading line in post_update

this UPDATE refers to the unit of work's need to consider this
additional UPDATE as a dependency and not an actual UPDATE statement.

Change-Id: I2a520af21ebf96b45c431efa898d4e7683a5bc2d
References: #9066
References: #1063

diff --git a/lib/sqlalchemy/orm/_orm_constructors.py b/lib/sqlalchemy/orm/_orm_constructors.py
index 3ca9cac0750040c9e43a188602a13a6ba6c94490..424385e1b778f08d68629d66fc03ae6054f69d59 100644 (file)
--- a/lib/sqlalchemy/orm/_orm_constructors.py
+++ b/lib/sqlalchemy/orm/_orm_constructors.py
@@ -1397,9 +1397,7 @@ def relationship(
     :param post_update:
       This indicates that the relationship should be handled by a
       second UPDATE statement after an INSERT or before a
-      DELETE. Currently, it also will issue an UPDATE after the
-      instance was UPDATEd as well, although this technically should
-      be improved. This flag is used to handle saving bi-directional
+      DELETE. This flag is used to handle saving bi-directional
       dependencies between two individual rows (i.e. each row
       references the other), where it would otherwise be impossible to
       INSERT or DELETE both rows fully since one row exists before the