Fix S2743 FP: Arrow properties do not have static fields

[pavel-mikula-sonarsource]

The S2743 rule says

A static field in a generic type is not shared among instances of different close constructed types.

but when it is an arrow property, there's no static field involved.

public class Sample<T>
{
    protected static IEnumerable<string> Empty => Enumerable.Empty<string>(); // Noncompliant FP
}