refactor: clean up comments and unused code in various files

TEST/testGooglePhotosAPI.js

@@ -1,21 +1,3 @@
-// Google Photos Picker API Test
-//
-// Usage:
-//   node TEST/testGooglePhotosAPI.js <ACCESS_TOKEN>
-//   GOOGLE_ACCESS_TOKEN=ya29.xxx node TEST/testGooglePhotosAPI.js
-//
-// The token must have been granted the scope:
-//   https://www.googleapis.com/auth/photospicker.mediaitems.readonly
-//
-// Getting a token from OAuth Playground (https://developers.google.com/oauthplayground):
-//   1. Click the gear icon → check "Use your own OAuth credentials"
-//   2. Enter your Client ID and Client Secret from Google Cloud Console
-//   3. In "Input your own scopes" enter:
-//        https://www.googleapis.com/auth/photospicker.mediaitems.readonly
-//   4. Click "Authorize APIs" and sign in with your test Google account
-//   5. Click "Exchange authorization code for tokens"
-//   6. Copy the Access token (starts with ya29.) and pass it here
-
 const PICKER_BASE = 'https://photospicker.googleapis.com/v1';
 const USERINFO_URL = 'https://www.googleapis.com/oauth2/v2/userinfo';
 
@@ -37,7 +19,6 @@ async function main() {
 
   console.log('\n--- Google Photos Picker API Test ---\n');
 
-  // Test 1 — User info
   console.log('[1] Fetching user info...');
   try {
     const res = await fetch(USERINFO_URL, { headers });
@@ -51,7 +32,6 @@ async function main() {
     console.log(`    Failed: ${err.message}\n`);
   }
 
-  // Test 2 — Create Picker session
   console.log('[2] Creating Picker session...');
   let sessionId = null;
   try {
@@ -68,7 +48,6 @@ async function main() {
       console.log(`    Session created: ${sessionId}`);
       console.log(`    mediaItemsSet: ${session.mediaItemsSet}\n`);
 
-      // Wait for session to be ready
       if (!session.mediaItemsSet) {
         console.log('    Waiting for session to become ready...');
         for (let i = 0; i < 10; i++) {
@@ -87,7 +66,6 @@ async function main() {
     console.log(`    Failed: ${err.message}\n`);
   }
 
-  // Test 3 — List media items from session
   if (sessionId) {
     console.log('[3] Fetching media items from session...');
     try {