Remove #12548's entry from the Wall of Browser Bugs

Since https://crbug.com/346051 has been closed as WontFix.
Bug is now documented in MDN:
    https://developer.mozilla.org/en-US/docs/Web/HTML/Element/Input$compare?locale=en-US&to=698785&from=693137
Refs #12548

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Merge pull request #15215 from twbs/input-date-chrome

Remove #12548's entry from the Wall of Browser Bugs
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