Disallow empty images.
In Markdown, it’s not always easy to spot when you’ve forgotten to provide a destination for an image. This is especially common when you’re writing something in Markdown and intend to insert an image, leaving the destination to fill in later, only to forget to go back and complete it. This often results in broken image links.
This rule warns when it finds images that either don't have a URL specified or have only an empty fragment ("#").
Examples of incorrect code for this rule:
<!-- eslint markdown/no-empty-images: "error" -->
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Examples of correct code:
<!-- eslint markdown/no-empty-images: "error" -->

If you aren't concerned with empty images, you can safely disable this rule.