Improve randomString mock for better snapshots (#11375)

test/components/views/settings/tabs/user/SidebarUserSettingsTab-test.tsx

@@ -24,12 +24,6 @@ import { MetaSpace } from "../../../../../../src/stores/spaces";
 import { SettingLevel } from "../../../../../../src/settings/SettingLevel";
 import { flushPromises } from "../../../../../test-utils";
 
-// used by checkbox to relate labels to inputs
-// make it stable for snapshot testing
-jest.mock("matrix-js-sdk/src/randomstring", () => ({
-    randomString: jest.fn().mockReturnValue("abcd"),
-}));
-
 describe("<SidebarUserSettingsTab />", () => {
     beforeEach(() => {
         jest.spyOn(PosthogTrackers, "trackInteraction").mockClear();