The solution to remove these options from my RCP was to just include the below Extension in my RCP's plugin.xml file.
< extension point="org.eclipse.ui.activities">
< activity id="rcpcolibri.disablextensions" name="Hidden activities"/>
< activityPatternBinding activityId="rcpcolibri.disablextensions"pattern="org.eclipse.debug.ui.*" / >
< activityPatternBinding activityId="rcpcolibri.disablextensions"pattern="org.eclipse.search.*" / >< / extension>