Remove feature_custom_status

Rationale: It's legacy and wrong in so many ways.

src/settings/Settings.tsx

@@ -23,7 +23,6 @@ import {
     NotificationBodyEnabledController,
     NotificationsEnabledController,
 } from "./controllers/NotificationControllers";
-import CustomStatusController from "./controllers/CustomStatusController";
 import ThemeController from './controllers/ThemeController';
 import PushToMatrixClientController from './controllers/PushToMatrixClientController';
 import ReloadOnChangeController from "./controllers/ReloadOnChangeController";
@@ -255,14 +254,6 @@ export const SETTINGS: {[setting: string]: ISetting} = {
         },
 
     },
-    "feature_custom_status": {
-        isFeature: true,
-        labsGroup: LabGroup.Profile,
-        displayName: _td("Custom user status messages"),
-        supportedLevels: LEVELS_FEATURE,
-        default: false,
-        controller: new CustomStatusController(),
-    },
     "feature_video_rooms": {
         isFeature: true,
         labsGroup: LabGroup.Rooms,

src/settings/controllers/CustomStatusController.ts

@@ -1,29 +0,0 @@
-/*
-Copyright 2019, 2020 The Matrix.org Foundation C.I.C.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-import SettingController from "./SettingController";
-import dis from "../../dispatcher/dispatcher";
-import { SettingLevel } from "../SettingLevel";
-
-export default class CustomStatusController extends SettingController {
-    public onChange(level: SettingLevel, roomId: string, newValue: any) {
-        // Dispatch setting change so that some components that are still visible when the
-        // Settings page is open (such as RoomTiles) can reflect the change.
-        dis.dispatch({
-            action: "feature_custom_status_changed",
-        });
-    }
-}