Remove unused imports in ltx2.py (json, requests)

Flagged by code quality bot on PR #9.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ConalMullan

tools/ltx2.py

@@ -28,17 +28,15 @@
 
 import argparse
 import base64
-import json
 import sys
 from pathlib import Path
 from typing import Optional
 
 try:
-    import requests
     from dotenv import load_dotenv
 except ImportError as e:
     print(f"Missing dependency: {e}")
-    print("Install with: pip install requests python-dotenv")
+    print("Install with: pip install python-dotenv")
     sys.exit(1)
 
 load_dotenv()