revert un-necessary test change

Author: picnixz

Lib/test/test_sqlite3/util.py

@@ -50,7 +50,7 @@ def check_tracebacks(self, cm, exc, exc_regex, msg_regex, obj_name):
         with contextlib.redirect_stderr(buf):
             yield
 
-        self.assertIsSubclass(cm.unraisable.exc_type, exc)
+        self.assertEqual(cm.unraisable.exc_type, exc)
         if exc_regex:
             msg = str(cm.unraisable.exc_value)
             self.assertIsNotNone(exc_regex.search(msg), (exc_regex, msg))