Howdy;
Review how and where you obtained your script or scripts.
Did you obtain your script directly from the script owner / script owners website or a third party source?
Is the script commercial software that requires a license or license key to legally use?
If yes, did you legally obtain a valid legal license or license key from script owner?
And, yes, it is possible to remove nulled scripts just like any other script, file, or folder on your account.
But, due to the various security measures in place at x10Hosting, nulled scripts are detected very quickly and the associated offending account suspended.
The simple fact that your account is not currently suspended is a reasonably good indicator that you do not currently have nulled scripts.