There is not a way to completely remove the icons that I know of, but there is a little trick to make it look like they are not there.
the folder that you wish to hide the icon for.
2. Choose Properties
from the menu, and in the pop-up, choose the Customize
3. Near the bottom of the window, click the Change icon
4. In the new pop-up, scroll right
until you come to what appears to be three missing icons
from the gallery.
5. Click on one of these blank spaces, click OK, then Click Apply back in the Properties window and see if it worked. It should, I use it often myself. If it did work for you, click OK.
Viola`......invisible icon.Note:I recommend creating a System Restore Point before doing this, and also take note of the default icons just in case.
Here is a Screen Shot, click to see it full size.
Hope this helps,