refactor(frontend): definePropsを別途インポートしている箇所を除去 (#15375)

packages/frontend/src/components/MkRoleSelectDialog.vue

@@ -43,7 +43,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 </template>
 
 <script setup lang="ts">
-import { computed, defineProps, ref, toRefs } from 'vue';
+import { computed, ref, toRefs } from 'vue';
 import * as Misskey from 'misskey-js';
 import { i18n } from '@/i18n.js';
 import MkButton from '@/components/MkButton.vue';