How do I remove the icons in Plone?

This will allow you to remove the navigation icons that appear in Plone’s navigation portlet. 
 
 go into ZMI (Zope Management Interface) 	 go to Root Folder of your site 	 click on portal_css ( CSS Registry). There you’ll see a long list of all the CSSes affecting your site 	 disable generated.css 
 
 Additionally: 
 under “Condition” put the following: not: portal/portal_membership/isAnonymousUser (This will allow the icons to appear to users who are logged in.)