Remove this inner class, when Disposable class start support AllowMultipleDisposeCalls value overriding

[Konard]

Data.Doublets/Platform.Data.Doublets/Decorators/LinksDisposableDecoratorBase.cs

Lines 11 to 21 in d047063

	protected class DisposableWithMultipleCallsAllowed : Disposable
	{
	[MethodImpl(MethodImplOptions.AggressiveInlining)]
	public DisposableWithMultipleCallsAllowed(Disposal disposal) : base(disposal) { }
	protected override bool AllowMultipleDisposeCalls
	{
	[MethodImpl(MethodImplOptions.AggressiveInlining)]
	get => true;
	}
	}

This issue can be closed as soon as linksplatform/Disposables#35 issue is fixed.