Automatad Bid Adapter: update doc to reflect placementId as optional …

…parameter for adapter (#3693)

* added automatad openRTB adapter doc

* Update automatad documentation with first party data support status

* remove duplicate file

* make placementId optional

dev-docs/bidders/automatad.md

@@ -15,4 +15,4 @@ fpd_supported: false
 | Name      | Scope    | Description               | Example    | Type     |
 |-----------|----------|---------------------------|------------|----------|
 | `siteId`    | required | The site ID from automatad.  | `"12adf45c"` | `string` |
-| `placementId`    | required | The placement ID from automatad.  | `"a34gh6d"` | `string` |
+| `placementId`    | optional | The placement ID from automatad.  | `"a34gh6d"` | `string` |