Address review

Author: sobolevn

Lib/test/test_free_threading/test_collections.py

@@ -30,27 +30,23 @@ def test_index_race_in_ac(self):
         # it was used without a critical section.
 
         d = deque(range(100))
-        N_MUT = 3
-        barrier = Barrier(1 + N_MUT)
 
         def index():
-            barrier.wait()
             for _ in range(10000):
                 try:
                     d.index(50)
                 except ValueError:
                     pass
 
         def mutate():
-            barrier.wait()
             for _ in range(10000):
                 d.append(0)
                 d.clear()
                 d.extend(range(100))
                 d.appendleft(-1)
 
         threading_helper.run_concurrently(
-            [index, *[mutate for _ in range(N_MUT)]],
+            [index, *[mutate for _ in range(3)]],
         )