Inline inviteMultipleToRoom (#33027)

This two-line method serves mostly to obfuscate, imho. Let's get rid of it.

apps/web/test/unit-tests/RoomInvite-test.ts

@@ -1,33 +0,0 @@
-/*
-Copyright 2025 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 { getMockClientWithEventEmitter } from "../test-utils";
-import { inviteMultipleToRoom } from "../../src/RoomInvite.tsx";
-
-afterEach(() => {
-    jest.restoreAllMocks();
-});
-
-describe("inviteMultipleToRoom", () => {
-    it("can be called wth no `options`", async () => {
-        const client = getMockClientWithEventEmitter({});
-        const { states, inviter } = await inviteMultipleToRoom(client, "!room:id", []);
-        expect(states).toEqual({});
-
-        // @ts-ignore reference to private property
-        expect(inviter.options).toEqual({});
-    });
-});