remove com.unity.purchasing dep from project

Project/Packages/manifest.json

     "com.unity.ml-agents": "file:../../com.unity.ml-agents",
     "com.unity.package-manager-ui": "2.0.13",
     "com.unity.package-validation-suite": "0.7.15-preview",
-    "com.unity.purchasing": "2.2.1",
     "com.unity.textmeshpro": "1.4.1",
     "com.unity.modules.ai": "1.0.0",
     "com.unity.modules.animation": "1.0.0",

Project/ProjectSettings/ProjectVersion.txt

-m_EditorVersion: 2018.4.32f1
+m_EditorVersion: 2018.4.35f1

Project/ProjectSettings/UnityConnectSettings.asset

 UnityConnectSettings:
   m_ObjectHideFlags: 0
   serializedVersion: 1
-  m_Enabled: 1
+  m_Enabled: 0
   m_TestMode: 0
   m_EventOldUrl: https://api.uca.cloud.unity3d.com/v1/events
   m_EventUrl: https://cdp.cloud.unity3d.com/v1/events