remove insanely old note from 12 years ago

Change-Id: Id0929b6bc062fc4766c9c69427524e3cd2da1030
(cherry picked from commit 853f726454cff2f34c010cbafacfec85f51f8eeb)
(cherry picked from commit 7256643fd8bab26d389c872102b76a6fdef2731f)

diff --git a/doc/build/orm/collections.rst b/doc/build/orm/collections.rst
index dbcd8d5654597d73410f535814bb829af217a43a..f8aa55c63383b66b35c138d3a3eaa28ef2b78e7a 100644 (file)
--- a/doc/build/orm/collections.rst
+++ b/doc/build/orm/collections.rst
@@ -599,20 +599,6 @@ must decorate appender and remover methods, however- there are no compatible
 methods in the basic dictionary interface for SQLAlchemy to use by default.
 Iteration will go through ``itervalues()`` unless otherwise decorated.
 
-.. note::
-
-   Due to a bug in MappedCollection prior to version 0.7.6, this
-   workaround usually needs to be called before a custom subclass
-   of :class:`.MappedCollection` which uses :meth:`.collection.internally_instrumented`
-   can be used::
-
-    from sqlalchemy.orm.collections import _instrument_class, MappedCollection
-    _instrument_class(MappedCollection)
-
-   This will ensure that the :class:`.MappedCollection` has been properly
-   initialized with custom ``__setitem__()`` and ``__delitem__()``
-   methods before used in a custom subclass.
-
 .. autoclass:: sqlalchemy.orm.collections.MappedCollection
    :members: