- Removed local import of 'time' module in scan_wifi_networks method
- The 'time' module is already imported at the top of the file
- Local import was creating a variable that shadowed the imported module
- This caused UnboundLocalError when trying to access time.sleep(2)
- WiFi scanning should now work without variable scoping errors

This resolves the 'cannot access local variable time where is not associated with a value' error
that occurred during WiFi network scanning in the AutoInstaller GUI.