Removed test for old migrations that caused flaky results

api/tests/federation/test_migrations.py

-def test_domain_14_migration(migrator):
-    a, f, t = ("federation", "0014_auto_20181205_0958", "0015_populate_domains")
-
-    migrator.migrate([(a, f)])
-    old_apps = migrator.loader.project_state([(a, f)]).apps
-    Actor = old_apps.get_model(a, "Actor")
-    a1 = Actor.objects.create(
-        fid="http://testmigration1.com",
-        preferred_username="test1",
-        old_domain="dOmaiN1.com",
-    )
-    a2 = Actor.objects.create(
-        fid="http://testmigration2.com",
-        preferred_username="test2",
-        old_domain="domain1.com",
-    )
-    a3 = Actor.objects.create(
-        fid="http://testmigration3.com",
-        preferred_username="test2",
-        old_domain="domain2.com",
-    )
-
-    migrator.loader.build_graph()
-    migrator.migrate([(a, t)])
-    new_apps = migrator.loader.project_state([(a, t)]).apps
-
-    Actor = new_apps.get_model(a, "Actor")
-    Domain = new_apps.get_model(a, "Domain")
-
-    a1 = Actor.objects.get(pk=a1.pk)
-    a2 = Actor.objects.get(pk=a2.pk)
-    a3 = Actor.objects.get(pk=a3.pk)
-
-    assert Domain.objects.count() == 2
-    assert a1.domain == Domain.objects.get(pk="domain1.com")
-    assert a2.domain == Domain.objects.get(pk="domain1.com")
-    assert a3.domain == Domain.objects.get(pk="domain2.com")
-
-    assert Domain.objects.get(pk="domain1.com").creation_date == a1.creation_date
-    assert Domain.objects.get(pk="domain2.com").creation_date == a3.creation_date