The combination of system asset and field type to remove.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v26/services/ad_group_ad_service.proto)

| Fields ||
|---|---|
| ## `asset` | `string` Required. The resource name of the asset to be removed. |
| ## `asset_field_type` | `https://developers.google.com/google-ads/api/reference/rpc/v26/AssetFieldTypeEnum.AssetFieldType` Required. The asset field type. |