If the software you are trying to uninstall is an MSI package you can add a step of action 'MSIUninstaller' to your deployment package, and select the software that needs to be uninstalled as shown in the screenshot below.
If the software is not an MSI package you will need to search for the procedures and commands that are required to uninstall it. Always test your command in the command prompt of a client machine before adding them to a deployment package. If they work in the command prompt they should work in the deployment package. Also have a look at how to
create a deployment package.
For utorrent we found this command "%Program Files%\uTorrent\uTorrent.exe" "%Program Files%\uTorrent\uTorrent.exe" /UNINSTALL /S in
this postBitTorrent: "C:\Program Files\BitTorrent\bittorrent.exe" /uninstall /s in
this post