Revert PLT-7809 (#7793)

* Update webrtc_test.go

* Update webrtc.go

* Update config.go

* Update webrtc.go

model/config.go

@@ -474,7 +474,6 @@ type NativeAppSettings struct {
 
 type WebrtcSettings struct {
 	Enable              *bool
-	GatewayType         *string
 	GatewayWebsocketUrl *string
 	GatewayAdminUrl     *string
 	GatewayAdminSecret  *string