Likes: remove uncrawlable a tag

### Quick summary

When the Jetpack Likes module is enabled, and Social Sharing is enabled an uncrawlable link is added by the sharedaddy module - ,

### Steps to reproduce

1. Ensure you have likes turned on for posts.
2. Visit a post in your site and confirm the like button is active.
3. Run the post through Page Speed Insights - https://pagespeed.web.dev/
4. Observe the crawlable link errors. on

### What you expected to happen

I expected no empty links tied to my likes and sharing buttons to affect my SEO.

### What actually happened

An empty link attribute is created tied to - 'sd-link-color'.

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 You can also confirm this by searching in the page source for 'sd-link-color'.

### Impact

Most (> 50%)

### Available workarounds?

No but the platform is still usable

### Platform (Simple and/or Atomic)

Simple, Atomic

### Logs or notes

_No response_

Reproduce the issue with Jetpack Likes and Social Sharing enabled, then inspect the generated page source for the empty `sd-link-color` anchor added by the sharedaddy module. Use PageSpeed Insights to confirm the crawlable-link warning is gone; done means the empty link is no longer emitted while the Likes and sharing controls still work.

Written by the indexing model from the issue text.