Description

When an interface method only calls itself (cycle), it can be removed.

Sample repro

[UsedImplicitly]
public interface IStuff
{
    void OnlyCallsItself();
}

internal sealed class Foo : IStuff
{
    private readonly IStuff wrapped;
    public Foo(IStuff wrapped)
    {
        this.wrapped = wrapped;
    }
    public void OnlyCallsItself()
    {
        wrapped.OnlyCallsItself();
    }
}

[UsedImplicitly(ImplicitUseTargetFlags.WithMembers)]
public sealed class FooBuilder
{
    internal Foo Create(IStuff stuff)
    {
        return new Foo(stuff);
    }
}

Expected result

Method OnlyCallsItself only calls itself and it can be removed.

Actual result

Nothing.
But I can safely remove all OnlyCallsItself methods.

Versions

Resharper 2017.3.5