Update docfx.json

Author: dend

exchange/docfx.json

@@ -54,7 +54,6 @@
     "overwrite": [],
     "externalReference": [],
     "globalMetadata": {
-      "apiPlatform": "powershell",
       "author" : "chrisda",
       "ms.author" : "chrisda",
       "manager" : "serdars",