tests: re-enable generate_family_file_tests for wsbeta

generate_family_file_tests.TestGenerateFamilyFile.test_attributes_after_run
passes; re-enable this test. Tests on musicbrainz wiki are no longer done.

Bug: T243669
Change-Id: I5950d5424c34838f26f62293576e09d5abe50dee

tests/generate_family_file_tests.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 """Test generate_family_file script."""
 #
-# (C) Pywikibot team, 2018-2024
+# (C) Pywikibot team, 2018-2025
 #
 # Distributed under the terms of the MIT license.
 #
@@ -91,12 +91,10 @@ def test_attributes_after_run(self):
         with self.subTest(test='Test whether default is loaded'):
             self.assertIn(self.site.lang, gen.wikis)
 
-        # Subtest fails on musicbrainz (T130381) and wsbeta (T243669)
-        if self.site.family.name not in ('wsbeta', 'musicbrainz'):
-            with self.subTest(test='Test element counts'):
-                if self.site.lang not in gen.prefixes:
-                    gen.prefixes.append(self.site.lang)
-                self.assertCountEqual(gen.prefixes, gen.wikis)
+        with self.subTest(test='Test element counts'):
+            if self.site.lang not in gen.prefixes:
+                gen.prefixes.append(self.site.lang)
+            self.assertCountEqual(gen.prefixes, gen.wikis)
 
         # test creating Site from url
         # only test Sites for downloaded wikis (T241413)