>>> (define-icon warnings-suppress button
>>> -  `((emoji "⛔")
>>> +  `((emoji "⚠️")
> [...]
> Re-reading your patch, I realized your patch does exactly what
> I described.  Maybe we should rename the icon so it doesn’t say
> suppress.

Unfortunately, renaming an icon is not so simple.
First we need to mark an old name as obsolete
because very likely many users already customized it
with 'M-x customize-icon RET warnings-suppress RET'
that adds to the custom file a setting like this:

  (custom-set-icons
    '(warnings-suppress ((emoji "⚠️") (symbol " ■ ") (text " stop "))))

And I even don't know how to make it obsolete.
For example, there is 'define-obsolete-face-alias',
but no something like 'define-obsolete-icon-alias'.

> And for the symbol we could use ⚠.

Thanks.  I tried to find a suitable character for the symbol,
but didn't realize this could be used for it.

Here is the patch that also updates the docstring: