How to uninstall the Certero Client Agent from a computer.
Single Machine (Interactive): You can uninstall via Control Panel > Programs and Features > select "Certero AssetStudio Client" > Uninstall.
Single Machine/Multiple Machines (GUI): You can uninstall via Certero. Go to Computer Systems - All Systems. Select the computer(s) you wish to remove the agent from, right click and choose Actions - Uninstall Client.
N.B - This method also works for uninstalling the Client agent from macOS computers.

Scripted / Multiple Machines (Silent): The built-in uninstaller supports a silent switch:
"C:\Program Files\Certero\Client\uninst.exe" /S
Alternatively, if you deployed via MSI, you can use:
msiexec /x {D03B1549-42EA-4E4A-957C-298383C024F0} /qn
Both of these can be pushed out via your RMM or deployment tooling for bulk removal.