remove test decorator

Signed-off-by: Me <[email protected]>

Author: Me

tests/test_lstm.py

@@ -776,7 +776,6 @@ def func(x):
         self.run_test_case(func, {"input:0": x_val}, [], ["output:0", "output1:0"], rtol=1e-05, atol=1e-06)
 
     @check_tf_min_version("2.0")
-    @skip_tf_versions("2.1", "Bug in TF 2.1")
     def test_keras_bilstm_recurrent_activation_is_hard_sigmoid(self):
         in_shape = [10, 3]
         x_val = np.random.uniform(size=[2, 10, 3]).astype(np.float32)