if you disable the rss feeds, the links wont be shown… you can edit each forum on forum – forums – manage groups and forums and disable individually… or in the sp admin for forums, there is a disable all rss feeds menu item…

if you want the feeds active but not the buttons, then just edit your sp theme and remove the template tags that display the buttons… we recommend you make your own theme (start with one of ours) rather than edit ours since changes will get lost on upgrade…