Remove RewardProvider from Barracuda Policy.

UnitySDK/Assets/ML-Agents/Scripts/Policy/BarracudaPolicy.cs

 using Barracuda;
 using System.Collections.Generic;
 using MLAgents.InferenceBrain;
-using MLAgents.RewardProvider;
 
 namespace MLAgents
 {
         /// Sensor shapes for the associated Agents. All Agents must have the same shapes for their Sensors.
         /// </summary>
         List<int[]> m_SensorShapes;
-        IRewardProvider m_RewardProvider;
-            InferenceDevice inferenceDevice,
-            IRewardProvider rewardProvider)
+            InferenceDevice inferenceDevice)
-            m_RewardProvider = rewardProvider;
         }
 
         /// <inheritdoc />

UnitySDK/Assets/ML-Agents/Scripts/Policy/BehaviorParameters.cs

                 case BehaviorType.HeuristicOnly:
                     return new HeuristicPolicy(heuristic);
                 case BehaviorType.InferenceOnly:
-                    return new BarracudaPolicy(m_BrainParameters, m_Model, m_InferenceDevice, rewardProvider);
+                    return new BarracudaPolicy(m_BrainParameters, m_Model, m_InferenceDevice);
                 case BehaviorType.Default:
                     if (FindObjectOfType<Academy>().IsCommunicatorOn)
                     {
                     {
-                        return new BarracudaPolicy(m_BrainParameters, m_Model, m_InferenceDevice, rewardProvider);
+                        return new BarracudaPolicy(m_BrainParameters, m_Model, m_InferenceDevice);
                     }
                     else
                     {