Remove various remaining bits of ILAG flows

TypeScript helpfully pointed me towards this dead code, which has been floating
around unused for a while. If we want to bring back ILAG in the future, we can
always revive it from history.

src/toasts/SetPasswordToast.ts

@@ -1,47 +0,0 @@
-/*
-Copyright 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 { _t } from "../languageHandler";
-import Modal from "../Modal";
-import SetPasswordDialog from "../components/views/dialogs/SetPasswordDialog";
-import GenericToast from "../components/views/toasts/GenericToast";
-import ToastStore from "../stores/ToastStore";
-
-const onAccept = () => {
-    Modal.createTrackedDialog('Set Password Dialog', 'Password Nag Bar', SetPasswordDialog);
-};
-
-const TOAST_KEY = "setpassword";
-
-export const showToast = () => {
-    ToastStore.sharedInstance().addOrReplaceToast({
-        key: TOAST_KEY,
-        title: _t("Set password"),
-        props: {
-            description: _t("To return to your account in future you need to set a password"),
-            acceptLabel: _t("Set Password"),
-            onAccept,
-            rejectLabel: _t("Later"),
-            onReject: hideToast, // it'll return on reload
-        },
-        component: GenericToast,
-        priority: 60,
-    });
-};
-
-export const hideToast = () => {
-    ToastStore.sharedInstance().dismissToast(TOAST_KEY);
-};