Facebook Only Supports App Impressions (prebid#1396)

adapters/audienceNetwork/facebook.go

@@ -472,15 +472,11 @@ func (fa *FacebookAdapter) MakeTimeoutNotification(req *adapters.RequestData) (*
 		return &adapters.RequestData{}, []error{err}
 	}
 
-	// The publisher ID is either in the app object or the site object, depending on the supply of the request so we need
-	// to check both
+	// The publisher ID is expected in the app object
 	pubID, err = jsonparser.GetString(req.Body, "app", "publisher", "id")
 	if err != nil {
-		pubID, err = jsonparser.GetString(req.Body, "site", "publisher", "id")
-		if err != nil {
-			return &adapters.RequestData{}, []error{
-				errors.New("path [app|site].publisher.id not found in the request"),
-			}
+		return &adapters.RequestData{}, []error{
+			errors.New("path app.publisher.id not found in the request"),
 		}
 	}