tests_rbac: remove arbitrary execution time checks (#67550)

tests_rbac/test_rbac.py

@@ -169,17 +169,10 @@ def test_massive_role_parenting(db):
     )
     roles[0].members.add(user)
     Role.objects.get(pk=roles[-1].pk).permissions.add(perm)
-    b = time.time()
     for i in range(SIZE):
         assert models.Operation.objects.has_perm(user, 'admin', User)
-    t = time.time() - b
-    assert float(t) / SIZE < 0.005
-    b = time.time()
     for i in range(SIZE):
         assert list(Role.objects.for_user(user).order_by('pk')) == list(Role.objects.order_by('pk'))
-    t = time.time() - b
-    assert float(t) / SIZE < 0.05
-    b = time.time()
 
 
 def test_rbac_backend(db):