nded to indicate_ the presence of a completion suggestion, 
and authors _should not_ dynamically change its value in order to communicate the presence of a suggestion. 
When a text entry element has `aria-autocomplete` set to `"list"` or `"both"`, 
authors should use the `aria-expanded` state to communicate whether the element that presents the suggestion collection is displayed.

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### What to do

* Remove the `aria-autocomplete` attribute from any popup elements of the combobox
