removed observation changes from shielding wrapper

examples/shields/rl/sb3utils.py

@@ -12,8 +12,6 @@ class MiniGridSbShieldingWrapper(gym.core.Wrapper):
                  mask_actions=True,
                  ):
         super().__init__(env)
-        self.observation_space = env.observation_space.spaces["image"]
-
         self.shield_handler = shield_handler
         self.mask_actions = mask_actions
         self.create_shield_at_reset = create_shield_at_reset
@@ -33,11 +31,10 @@ class MiniGridSbShieldingWrapper(gym.core.Wrapper):
         if self.create_shield_at_reset and self.mask_actions:
             shield = self.shield_handler.create_shield(env=self.env)
             self.shield = shield
-        return obs["image"], infos
+        return obs, infos
 
     def step(self, action):
-        orig_obs, rew, done, truncated, info = self.env.step(action)
-        obs = orig_obs["image"]
+        obs, rew, done, truncated, info = self.env.step(action)
 
         return obs, rew, done, truncated, info