fix.

src/admin/problem/list.vue

@@ -1,7 +1,7 @@
 <script setup lang="ts">
 import { getProblemList, getProblem, editProblem } from "../api"
 import Pagination from "~/shared/Pagination.vue"
-import { DataTableColumn, NSwitch } from "naive-ui"
+import { NSwitch } from "naive-ui"
 import { AdminProblemFiltered } from "~/utils/types"
 import { parseTime } from "~/utils/functions"
 import Actions from "./components/Actions.vue"