Update vendor-specific-records.mdx (#21601)

Remove Vercel b/c they're being kinda hostile

Author: kodster28

src/content/docs/dns/manage-dns-records/reference/vendor-specific-records.mdx

@@ -208,11 +208,6 @@ Refer to Unbounce's documentation to [get a `CNAME` value](https://documentation
 If Cloudflare is activated via one of our hosting partners, your `CNAME` record should be [DNS-only (unproxied)](/dns/proxy-status/#dns-only-records).
 :::
 
-### Vercel
-
-For help using Cloudflare with Vercel, refer to [Vercel and Cloudflare Integration](https://vercel.com/docs/integrations/external-platforms/cloudflare#using-cloudflare-as-a-reverse-proxy)
-
-
 ### Wix
 
 You can use Cloudflare with [Wix websites](https://www.wix.com/), though your setup needs to be different than with most website builders.