no opp obs

Project/Assets/ML-Agents/Examples/Tennis/Prefabs/TennisArea.prefab

   m_Name: 
   m_EditorClassIdentifier: 
   m_BrainParameters:
-    vectorObservationSize: 14
+    vectorObservationSize: 10
     numStackedVectorObservations: 3
     vectorActionSize: 03000000
     vectorActionDescriptions: []
   score: 0
   myArea: {fileID: 1541947554534326}
   scale: 0
+  timePenalty: 0
 --- !u!114 &2449890524009497851
 MonoBehaviour:
   m_ObjectHideFlags: 0
   m_Name: 
   m_EditorClassIdentifier: 
   m_BrainParameters:
-    vectorObservationSize: 14
+    vectorObservationSize: 10
     numStackedVectorObservations: 3
     vectorActionSize: 03000000
     vectorActionDescriptions: []
   score: 0
   myArea: {fileID: 1541947554534326}
   scale: 0
+  timePenalty: 0
 --- !u!114 &6598495797138489682
 MonoBehaviour:
   m_ObjectHideFlags: 0

Project/Assets/ML-Agents/Examples/Tennis/Scripts/TennisAgent.cs

         sensor.AddObservation(m_InvertMult * m_BallRb.velocity.x / 40f);
         sensor.AddObservation(m_BallRb.velocity.y / 60f);
 
-        sensor.AddObservation(m_InvertMult * (opponent.transform.position.x - myArea.transform.position.x) / -25f);
-        sensor.AddObservation((opponent.transform.position.y - myArea.transform.position.y) / -7f);
-        sensor.AddObservation(m_InvertMult * m_OpponentRb.velocity.x / 20f);
-        sensor.AddObservation(m_OpponentRb.velocity.y / 20f);
+        //sensor.AddObservation(m_InvertMult * (opponent.transform.position.x - myArea.transform.position.x) / -25f);
+        //sensor.AddObservation((opponent.transform.position.y - myArea.transform.position.y) / -7f);
+        //sensor.AddObservation(m_InvertMult * m_OpponentRb.velocity.x / 20f);
+        //sensor.AddObservation(m_OpponentRb.velocity.y / 20f);
 
         //sensor.AddObservation(m_InvertMult * gameObject.transform.rotation.z);
         sensor.AddObservation((m_InvertMult * (gameObject.transform.rotation.eulerAngles.z - (1f - m_InvertMult) * 180f) - 35f) / 125f);