Deletes the RouteSettings for a stage.
See https://paws-r.github.io/docs/apigatewayv2/delete_route_settings.html for full documentation.
apigatewayv2_delete_route_settings(ApiId, RouteKey, StageName)
[required] The API identifier.
[required] The route key.
[required] The stage name. Stage names can only contain alphanumeric characters, hyphens, and underscores. Maximum length is 128 characters.