Eliminate system from ServletContext

[Ramos Miguel-FMR068c]

Hello all:

I installed a sample program on the tomcat server, but now I want to remove
it. 

I delete the entry from the server.xml and restarted the server, but it
seems that
didn't result.

What's the right procedure to delete a previous installed program from the
ServletContext?

Thanks again.

Miguel Ramos.