refactor: drop orphan team/org SSR & page helpers (calcom#28952)

The /org/[orgSlug]/[user] and /team/[slug] routes were removed in the Cal.diy fork (calcom#28903/calcom#28904) but their SSR helpers and Team screen component were left behind. No route, component, or test still imports them (verified with ripgrep). Deleting them removes dead code and makes it clearer that team/org pages are gone.

Author: romitg2