doc: remove style for empty links

[aduh95]

Fix the side effect when hovering over empty anchor links:

It appears on a few pages:

• async_hooks.html
• cli.html
• deprecations.html EDIT: Taken care of in doc: properly mark up deprecation anchors #34955
• errors.html

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• commit message follows commit guidelines

Refs: #34955

[aduh95]

/cc @Trott as you are the one who suggested this.

[Trott]

I imagine this may not be an issue now that the <a name="DEPxxxx"></a> links are removed, but not a bad idea to do it anyway.

[DerekNonGeneric]

Oh dear the anti-pattern exists elsewhere. For the error codes I think we can use a regular expression for if the heading starts with ERR, but in the meantime, you're right about needing this to be corrected.

[Trott]

Landed in ec5958f

[Trott]

Alas, this causes visited links to show in a different color.

Revert since we're eliminating <a name="foo"></a> tags anyway? Or add a:visited to the stylesheet?

@nodejs/website

[Trott]

#35108