Clean up substack URLs

[fmarier]

We should collect a few more samples before removing all of these parameters, but it looks like the following parameters may not be needed:

• publication_id
• post_id
• triggerShare
• isFreemail
• r
• triedRedirect

in the following URL:

• https://offmenu.substack.com/p/perplexity-the-ai-brand-everyone?publication_id=927490&post_id=145079075&triggerShare=true&isFreemail=true&r=nn1v0&triedRedirect=true