chore: drop comments that restate the code

test/helpers/FakeTokenStore.ts

@@ -1,6 +1,5 @@
 import type { TokenStore } from '../../src/token/TokenStore.js';
 
-/** In-memory token store for testing. */
 export function createFakeTokenStore(): TokenStore {
   let access: string | null = null;
   let refresh: string | null = null;

test/helpers/createClient.ts

@@ -2,7 +2,6 @@ import { RudderClient, createClient } from '../../src/client/RudderClient.js';
 import type { RudderClientOptions } from '../../src/client/RudderClientOptions.js';
 import { createFakeTokenStore } from './FakeTokenStore.js';
 
-/** Creates a RudderClient with test-friendly defaults and a fake token store. */
 export function createTestClient(overrides?: Partial<RudderClientOptions>): RudderClient {
   return createClient({
     baseUrl: 'https://api.test.rudder.build',