feat(ui): remove add clan button from ListClansModal

It was confusing how it worked. Cleaner to remove it and just have users X out of the modal and use the existing onboarding workflow.

Closes #5010

pkgs/clan-app/ui/src/modals/ListClansModal/ListClansModal.tsx

@@ -2,9 +2,6 @@ import { Modal } from "../../components/Modal/Modal";
 import cx from "classnames";
 import styles from "./ListClansModal.module.css";
 import { Typography } from "@/src/components/Typography/Typography";
-import { Button } from "@/src/components/Button/Button";
-import { navigateToOnboarding } from "@/src/hooks/clan";
-import { useNavigate } from "@solidjs/router";
 import { For, Show } from "solid-js";
 import { activeClanURI, clanURIs, setActiveClanURI } from "@/src/stores/clan";
 import { useClanListQuery } from "@/src/hooks/queries";
@@ -20,8 +17,6 @@ export interface ListClansModalProps {
 }
 
 export const ListClansModal = (props: ListClansModalProps) => {
-  const navigate = useNavigate();
-
   const query = useClanListQuery(clanURIs());
 
   // we only want clans we could interrogate successfully