Remove the deprecated use_strategy helper

Deprecated since 2020, users have had ample warning.

docs/changelog.rst

@@ -13,6 +13,7 @@ ChangeLog
 
   The transitional setting :attr:`factory.django.DjangoOptions.skip_postgeneration_save` can be removed.
 
+- :func:`factory.use_strategy`. Use :attr:`factory.FactoryOptions.strategy` instead.
 
 3.3.1 (2024-08-18)
 ------------------

docs/reference.rst

@@ -579,23 +579,6 @@ factory_boy supports two main strategies for generating instances, plus stubs.
         >>> return obj
 
 
-.. function:: use_strategy(strategy)
-
-    .. deprecated:: 3.2
-
-        Use :py:attr:`factory.FactoryOptions.strategy` instead.
-
-    *Decorator*
-
-    Change the default strategy of the decorated :class:`Factory` to the chosen ``strategy``:
-
-    .. code-block:: python
-
-        @use_strategy(factory.BUILD_STRATEGY)
-        class UserBuildingFactory(UserFactory):
-            pass
-
-
 .. data:: STUB_STRATEGY
 
     The 'stub' strategy is an exception in the factory_boy world: it doesn't return

factory/__init__.py

@@ -9,7 +9,6 @@
     Factory,
     ListFactory,
     StubFactory,
-    use_strategy,
 )
 from .declarations import (
     ContainerAttribute,

factory/base.py

@@ -727,20 +727,3 @@ def _create(cls, model_class, *args, **kwargs):
 class ListFactory(BaseListFactory):
     class Meta:
         model = list
-
-
-def use_strategy(new_strategy):
-    """Force the use of a different strategy.
-
-    This is an alternative to setting default_strategy in the class definition.
-    """
-    warnings.warn(
-        "use_strategy() is deprecated and will be removed in the future.",
-        DeprecationWarning,
-        stacklevel=2,
-    )
-
-    def wrapped_class(klass):
-        klass._meta.strategy = new_strategy
-        return klass
-    return wrapped_class