This is a fairly easy process which will require about a minute of your time, depending on how fast Cydia loads for you at the moment…
To remove your animated boot logo:
- Search and download “Apple Boot Logo” from Cydia
- Once installed, go to Settings > BootLogo > Apple Logo
This will bring back the stock Apple logo. If you ever want to go back to the GreenPois0n boot logo, you can always do so by following the steps above and selecting “Chronic Dev” instead.
And remember that there are now dozens of animated boot logos available on Cydia. You might find the perfect one for you there by doing a simple search.