Remove Contentrules via GenericSetup

Hello,

Is it possible to remove/delete/purge Contentrules via contentrules.xml in the uninstall Folder of an AddOn? I have added the file but nothing happens, or is my Syntax wrong?

<?xml version="1.0"?>
<!-- contentrules.xml -->
<contentrules>
    
    <rule
        name="rule-add-company-by-form"
        remove="True" />
    
    <assignment
        name="rule-add-company-by-form"
        remove="True" />
        
    <rule
        name="rule-1"
        remove="True" />
    
    <assignment
        name="rule-1"
        remove="True" />
        
</contentrules>

Or should i use <contentrules purge="True"> ?