feat: Removed hq signup page

adminsite/lib/api.ts

@@ -296,8 +296,6 @@ export const api = {
     staffLogin: (email: string, password: string) =>
         post<Session>("/auth/staff/login", { email, password }),
     logout: () => post<{ ok: boolean }>("/auth/logout"),
-    signup: (payload: { name: string; email: string; password: string; website?: string }) =>
-        post<{ pending: boolean }>("/auth/signup", payload),
     verify: (token: string) =>
         req<{ verified: boolean; needs_password?: boolean }>(
             `/auth/verify?token=${encodeURIComponent(token)}`,