Consider removing setHooks

[nolanlawson]

Currently setHooks is required to allow lwc:inner-html, but it seems that most consumers are just doing:

import { setHooks } from 'lwc'
setHooks({
  sanitizeHtmlContent(content) {
    return content;
  },
})

I.e. they are just making it a no-op, not doing any sanitization.

It's also a bit annoying that you can't call setHooks() more than once, which can lead to unexpected errors if someone earlier in the page load called setHooks before you did.

Potentially the original issue this was designed to solve could be solved by CSP and/or TrustedTypes. We should re-evaluate whether we still need this API or not.