Revert "feat: add mobile dropdown page and search"

This reverts commit 7a59f413b5.

open-isle-cli/src/utils/mobileDropdown.js

@@ -1,15 +0,0 @@
-import { reactive } from 'vue'
-
-const stores = reactive({})
-
-export function registerDropdownStore(id, store) {
-  stores[id] = store
-}
-
-export function getDropdownStore(id) {
-  return stores[id]
-}
-
-export function removeDropdownStore(id) {
-  delete stores[id]
-}