Ignore async without await compilation warning

Question

I have a base controller with the following abstract method:

[HttpDelete]
public abstract Task Delete(int id);

In one

Answer 1

Apart from ignoring the above warning, is there a better alternative (ie. changing the code above) so that this warning doesn't occur?

The alternative is to remove the async modifier and use Task.FromResult to return a Task:

public override Task Delete(int id)
{
    return Task.FromResult(
                ResponseMessage(Request.CreateResponse(
                                        HttpStatusCode.MethodNotAllowed,
                                        new NotSupportedException())));
}