Remove recent files from Unity in Ubuntu 11.04

Unity in Ubuntu 11.04 shows the recent files and folder that had been open recently by the user. Here is the simple step to delete the recent files and folder option from the Ubuntu Unity in Ubuntu 11.04.   

Paste the following code in terminal to delete the recent files and folder

$rm ~/.local/share/zeitgeist/activity.sqlite zeitgeist-daemon --replace
NOTE: This process will remove the recent files only for the current open 
session. When the system will be restarted, recent files and folder
option will appear again.