Revert "Early 0.18 work (#22138)" (#22142)

This reverts commit d24b96d3bb.

web/src/pages/Settings.tsx

@@ -36,7 +36,6 @@ import NotificationView from "@/views/settings/NotificationsSettingsView";
 import EnrichmentsSettingsView from "@/views/settings/EnrichmentsSettingsView";
 import UiSettingsView from "@/views/settings/UiSettingsView";
 import FrigatePlusSettingsView from "@/views/settings/FrigatePlusSettingsView";
-import MaintenanceSettingsView from "@/views/settings/MaintenanceSettingsView";
 import { useSearchEffect } from "@/hooks/use-overlay-state";
 import { useNavigate, useSearchParams } from "react-router-dom";
 import { useInitialCameraState } from "@/api/ws";
@@ -82,7 +81,6 @@ const allSettingsViews = [
   "roles",
   "notifications",
   "frigateplus",
-  "maintenance",
 ] as const;
 type SettingsType = (typeof allSettingsViews)[number];
 
@@ -122,10 +120,6 @@ const settingsGroups = [
     label: "frigateplus",
     items: [{ key: "frigateplus", component: FrigatePlusSettingsView }],
   },
-  {
-    label: "maintenance",
-    items: [{ key: "maintenance", component: MaintenanceSettingsView }],
-  },
 ];
 
 const CAMERA_SELECT_BUTTON_PAGES = [