remove unneccessary tf.reset_default_graph()

Author: jignparm

tests/test_backend.py

@@ -1789,23 +1789,20 @@ def func(x, y):
 
     @check_opset_min_version(10, "Slice")
     def test_strided_slice_reverse_1(self):
-        tf.reset_default_graph()
         x_val = np.arange(16 * 32).astype(np.float32).reshape((1, 16, 32, 1))
         def func(x):
             return tf.concat([x[:, :, :10], x[:, :, :21:-1]], axis=0, name=_TFOUTPUT)
         self._run_test_case(func, [_OUTPUT], {_INPUT: x_val})
 
     @check_opset_min_version(10, "Slice")
     def test_strided_slice_reverse_2(self):
-        tf.reset_default_graph()
         x_val = np.arange(16 * 32).astype(np.float32).reshape((1, 16, 32, 1))
         def func(x):
             return tf.concat([x[:, :, :10], x[:, :, 9::-1]], axis=0, name=_TFOUTPUT)
         self._run_test_case(func, [_OUTPUT], {_INPUT: x_val})
 
     @check_opset_min_version(10, "Slice")
     def test_strided_slice_reverse_3(self):
-        tf.reset_default_graph()
         x_val = np.zeros((1, 16, 32, 1)).astype(np.float32)
         y_val = np.array(9).astype(np.int32)
         z_val = np.array(-1).astype(np.int32)