Remove broken Sample from the package (#6230)

* Remove Sample from the package

* Update CHANGELOG

* Remove sample description in package.json

Author: maryamziaa

com.unity.ml-agents/CHANGELOG.md

@@ -8,12 +8,15 @@ and this project adheres to
 
 ## [Unreleased]
 ### Major Changes
-#### com.unity.ml-agents / com.unity.ml-agents.extensions (C#)
+#### com.unity.ml-agents (C#)
 - Upgraded to Inference Engine 2.2.1 (#6212)
 - The minimum supported Unity version was updated to 6000.0. (#6207)
 - Merge the extension package com.unity.ml-agents.extensions to the main package com.unity.ml-agents. (#6227)
 
 ### Minor Changes
+#### com.unity.ml-agents (C#)
+- Remove broken sample from the package (#6230)
+
 #### ml-agents / ml-agents-envs
 - Bumped grpcio version to >=1.11.0,<=1.53.2 (#6208)
 

com.unity.ml-agents/Samples.meta

@@ -9,12 +9,5 @@
     "com.unity.modules.imageconversion": "1.0.0",
     "com.unity.modules.jsonserialize": "1.0.0",
     "com.unity.modules.physics": "1.0.0"
-  },
-  "samples": [
-    {
-      "displayName": "3D Ball",
-      "description": "The 3D Ball sample is a simple environment that is a great for jumping into ML-Agents to see how things work.",
-      "path": "Samples~/3DBall"
-    }
-  ]
+  }
 }