remove xfail from test for Myerson fig 4.2 agent versus non-agent liap value

Author: rahulsavani

tests/test_behav.py

@@ -1018,11 +1018,8 @@ def test_agent_liap_value_reference(game: gbt.Game, action_probs: None | list,
      (games.create_mixed_behav_game_efg(), None, True, "1/4", "1/4", "1/16", "1/16"),
      (games.create_mixed_behav_game_efg(), None, False, 0.25, 0.25, 0.0625, 0.0625),
      # Myerson fig 2.4
-     pytest.param(
-        games.read_from_file("myerson_fig_4_2.efg"), [0, 1, 0, 1, 1, 0], True, 1, 0, 1, 0,
-        marks=pytest.mark.xfail(reason="Needs to be fixed now")
-     ),
-     ]
+     (games.read_from_file("myerson_fig_4_2.efg"), [0, 1, 0, 1, 1, 0], True, 1, 0, 1, 0),
+    ]
 )
 def test_agent_max_regret_versus_non_agent(game: gbt.Game, action_probs: None | list,
                                            rational_flag: bool,