I can't offer any advice on the firmware side of things, but if you're happy to just "hide" the icons checkout this
THREAD
You should be able to edit the file:
mnt/ext1/system/config/desktop/view.json
To hide an icon, just add an underscore to the start of it's reference in the groups section. e.g.
Code:
"PB_Gallery",
"PB_Library",
"_PB_Notes",
Notes would then be hidden.