review: update Lib/test/test_free_threading/test_collections.py

Co-authored-by: Pieter Eendebak <pieter.eendebak@gmail.com>

Author: KowalskiThomas

Lib/test/test_free_threading/test_collections.py

@@ -53,7 +53,6 @@ def mutate():
 class TestCounter(unittest.TestCase):
     def test_update_concurrent(self):
         # gh-151633: concurrent Counter.update calls must not cause use-after-free
-        # under free-threading.
         NTHREADS = 4
         PER_THREAD = 5000
         c = Counter()