chore: remove defineModel imports

* it is a compiler macro now, so no longer needs to be imported

frontend/src/components/Modals/DiscussionModal.vue

@@ -35,7 +35,7 @@
 </template>
 <script setup>
 import { Dialog, FormControl, TextEditor, createResource } from 'frappe-ui'
-import { reactive, defineModel } from 'vue'
+import { reactive } from 'vue'
 import { showToast, singularize } from '@/utils'
 
 const topics = defineModel('reloadTopics')