chore: refactor domain parsing to be more general (#3448)

* change the api of domain parsing to just parseDomain and getCookieDomain
* adds getBaseDomain as the method to get the domain after any official subdomains

app/utils/domains.ts

@@ -1,14 +0,0 @@
-import { parseDomain, stripSubdomain } from "@shared/utils/domains";
-import env from "~/env";
-
-export function getCookieDomain(domain: string) {
-  return env.SUBDOMAINS_ENABLED ? stripSubdomain(domain) : domain;
-}
-
-export function isCustomDomain() {
-  const parsed = parseDomain(window.location.origin);
-  const main = parseDomain(env.URL);
-  return (
-    parsed && main && (main.domain !== parsed.domain || main.tld !== parsed.tld)
-  );
-}