refactor(bot): remove unused max-tokens argument handling

- Simplified the `call_claude` function by removing the unused `MAX_TOKENS` argument handling.
- Ensures cleaner and more maintainable command construction.

systems/x86_64-linux/mx/nextcloud-claude-bot/bot.py

@@ -113,9 +113,6 @@ async def call_claude(prompt: str) -> str:
     """Call Claude CLI and return response."""
     cmd = [CLAUDE_PATH, "--print"]
 
-    if MAX_TOKENS:
-        cmd.extend(["--max-tokens", str(MAX_TOKENS)])
-    
     log.info(f"Calling Claude: {' '.join(cmd)}")
     
     try: