Unnecessary autocomplete support item

[WilcoFiers]

Noticed this one reviewing our support items. This looks like it might have been added by some misunderstanding on our part, not something that was a problem in browsers.

The issue here related to form elements with autocomplete=off, but as far as I can tell that does not result in elm.autocomplete === '' when the autocomplete is otherwise set.

Need for Call for Review: none, small change

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