To remove an OSX screen saver:

1.) Select "System Preferences..." in the Apple menu.
2.) Select the Display & Screen Save panel.
3.) Select the Screen Saver tab at the top of the panel.
4.) Select the screen saver you wish to uininstall from the list of screen savers.
5.) Click the "Options..." button and click the "Delete" button in the Options sheet.

To remove an OS 8 or 9 screen saver, you must remove the screen saver's control panel from the control panels folder:

1.) Go to System Folder, Control Panels.
2.) Locate the screen saver's control panel.
3.) Click and drag the control panel to the trash.
4.) Restart your computer.
The screen saver will be gone.