Remove workaround for DRF bug

patchwork/api/__init__.py

@@ -1,51 +0,0 @@
-# Patchwork - automated patch tracking system
-# Copyright (C) 2020, Stephen Finucane <stephen@that.guru>
-#
-# SPDX-License-Identifier: GPL-2.0-or-later
-
-from rest_framework.fields import empty
-from rest_framework.fields import get_attribute
-from rest_framework.fields import SkipField
-from rest_framework.relations import ManyRelatedField
-
-
-# monkey patch django-rest-framework to work around issue #7550 [1] until #7574
-# [2] or some other variant lands
-#
-# [1] https://github.com/encode/django-rest-framework/issues/7550
-# [2] https://github.com/encode/django-rest-framework/pull/7574
-
-
-def _get_attribute(self, instance):
-    # Can't have any relationships if not created
-    if hasattr(instance, 'pk') and instance.pk is None:
-        return []
-
-    try:
-        relationship = get_attribute(instance, self.source_attrs)
-    except (KeyError, AttributeError) as exc:
-        if self.default is not empty:
-            return self.get_default()
-        if self.allow_null:
-            return None
-        if not self.required:
-            raise SkipField()
-        msg = (
-            'Got {exc_type} when attempting to get a value for field '
-            '`{field}` on serializer `{serializer}`.\nThe serializer '
-            'field might be named incorrectly and not match '
-            'any attribute or key on the `{instance}` instance.\n'
-            'Original exception text was: {exc}.'.format(
-                exc_type=type(exc).__name__,
-                field=self.field_name,
-                serializer=self.parent.__class__.__name__,
-                instance=instance.__class__.__name__,
-                exc=exc,
-            )
-        )
-        raise type(exc)(msg)
-
-    return relationship.all() if hasattr(relationship, 'all') else relationship
-
-
-ManyRelatedField.get_attribute = _get_attribute