Want to know Netbackup Client uninstall procedure.

Same as for Unix clients.

See NBU 6.5 Installation Guide: http://www.symantec.com/docs/TECH52799 

Removing UNIX NetBackup client software
If you remove NetBackup from a machine with the NetBackup-Java Display Console installed, the console is also removed.
To remove UNIX NetBackup client software
1 Log in to the client system as the root user.
2 Navigate to the /usr/openv directory.
■ If /usr/openv is a physical directory, run the following command: rm -rf /usr/openv
■ If /usr/openv is a link, run the following commands: cd /usr/openv
pwd
ls
rm -rf *
cd /
rm -f /usr/openv

Remove NetBackup entries in the client’s /etc/servicesfile. Locate the lines, marked by the following strings and delete them:
# NetBackup services#
.....
# End NetBackup services #

See above manual for the rest of the steps.