Drop BWCompatInMemoryJournalWriter (released with swh.journal 0.0.30)

This should also fix the build for swh.loader.core

Test Plan

tox tests pass

---

Migrated from D3018 (view on Phabricator)

swh/storage/tests/conftest.py

@@ -7,7 +7,6 @@ import glob
 import pytest
 
 from typing import Union
-from unittest.mock import patch
 
 from pytest_postgresql import factories
 from pytest_postgresql.janitor import DatabaseJanitor, psycopg2, Version
@@ -31,7 +30,6 @@ from swh.model.model import (
     SkippedContent,
     Snapshot,
 )
-from swh.journal.writer.inmemory import InMemoryJournalWriter
 
 
 OBJECT_FACTORY = {
@@ -73,29 +71,9 @@ def swh_storage_backend_config(postgresql_proc, swh_storage_postgresql):
     }
 
 
-class BWCompatInMemoryJournalWriter(InMemoryJournalWriter):
-    """InMemoryJournalWriter that enforces conversion of objects to model entities
-
-    This is required until swh.journal 0.0.30 is available
-    """
-
-    def write_addition(self, object_type, object_):
-        if isinstance(object_, dict):
-            object_ = OBJECT_FACTORY[object_type](object_)
-        self.objects.append((object_type, object_))
-
-    write_update = write_addition
-
-
 @pytest.fixture
 def swh_storage(swh_storage_backend_config):
-    storage_config = {"cls": "validate", "storage": swh_storage_backend_config}
-    with patch(
-        "swh.journal.writer.inmemory.InMemoryJournalWriter",
-        return_value=BWCompatInMemoryJournalWriter(),
-    ):
-        storage = swh.storage.get_storage(**storage_config)
-    return storage
+    return swh.storage.get_storage(cls="validate", storage=swh_storage_backend_config)
 
 
 @pytest.fixture