How to Uninstall Time Machine in a Mac OS X Leopard
- 1). Remove the application file by going to the "Application" folder, clicking on the "Time Machine" icon, dragging it to the "Trash" folder in the Dock and dropping it.
- 2). Remove the preference file by highlighting the main hard drive in the Finder window under "Devices." Double-click on the "Library" folder. Double-click on the "Preferences" folder. Click on "com.apple.TimeMachine.plist," drag it to the "Trash" folder and drop it.
- 3). Uninstall Time Machine by selecting "Empty Trash" from the "File" menu.
Source...