Remove hardcoded KEY and custom.iso from rego-tunnel

- Removed KEY=B6QDN-RWKT8-G44CW-TXPBW-292XY that was causing activation issues
- Removed VERSION=/storage/custom.iso to allow user-config override

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/rego-tunnel/docker-compose.yml

@@ -20,8 +20,6 @@ services:
       - RAM_SIZE=${WINDOWS_RAM_GB}G
       - CPU_CORE=${WINDOWS_CPU_CORES}
       - DISK_SIZE=${WINDOWS_DISK_SIZE_GB}G
-      - VERSION=/storage/custom.iso
-      - KEY=B6QDN-RWKT8-G44CW-TXPBW-292XY
 
     volumes:
       - ${APP_DATA_DIR}/data/storage:/storage