Adopt new interface structure

alr_envs/open_ai/reacher_v2/mp_wrapper.py

@@ -1,7 +1,7 @@
 from typing import Union
 
 import numpy as np
-from mp_env_api.env_wrappers.mp_env_wrapper import MPEnvWrapper
+from mp_env_api.interface_wrappers.mp_env_wrapper import MPEnvWrapper
 
 
 class MPWrapper(MPEnvWrapper):
@@ -14,10 +14,6 @@ class MPWrapper(MPEnvWrapper):
     def current_pos(self) -> Union[float, int, np.ndarray]:
         return self.sim.data.qpos[:2]
 
-    @property
-    def goal_pos(self):
-        return self.goal
-
     @property
     def dt(self) -> Union[float, int]:
         return self.env.dt