fix(list): removed unnecessary setTimeout method

[akaSourav]

You are using the setTimeout method to wait and check that next focused element is inside the list or not.
But for focusout event FocusEvent.relatedTarget is the EventTarget which is receiving focus. So you can use FocusEvent.relatedTarget instead of the setTimeout method to check the focus is inside the list.

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[akaSourav]

@googlebot I signed it!

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