Removing Skills vs GainSkill

[kampnkarl]

Is it possible to remove a skill, doing the opposite of something like this

 

            <property class="Action0">
                <property name="Class" value="GainSkill"/>
                <property name="Skills_to_gain" value="perkASAthletics"/>
            </property>

 

Instead of GainSkill, is there something like RemoveSkill?