[b49b2e] Heading is descriptive -- Remove inapplicable examples of empty headings

[daniel-montalvo]

Removes inapplicable examples of this rule where there's empty headings as there's no consensus on whether or not they should fail WCAG and, if they should fail, under wihch SC

Closes issue(s):

• closes [b49b2e] Heading is descriptive - Inapplicable examples #2258

Need for Call for Review:
This will require a 2 weeks Call for Review << new rule, or substantial changes affecting a large number of examples, if in doubt, use this. >>

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[Jym77]

Can you add a Background note to explain this? (lack of consensus, so not taking a stance)