remove cubocore overlay

overlays/cubocore/etc/sddm.conf

overlays/cubocore/etc/skel/.config/QtProject.conf

...core/etc/skel/.config/autostart/nm-tray-autostart.desktop

overlays/cubocore/etc/skel/.config/coreapps/coreapps.conf

overlays/cubocore/etc/skel/.config/coreapps/corepad.conf

overlays/cubocore/etc/skel/.config/coreapps/file.cache

overlays/cubocore/etc/skel/.config/coreapps/folder.cache

overlays/cubocore/etc/skel/.config/coreapps/mimeapps.list

overlays/cubocore/etc/skel/.config/coreapps/note

overlays/cubocore/etc/skel/.config/coreapps/thumbs.cache

...cubocore/etc/skel/.config/falkon/profiles/default/Cookies

.../etc/skel/.config/falkon/profiles/default/Cookies-journal

.../etc/skel/.config/falkon/profiles/default/GPUCache/data_0

.../etc/skel/.config/falkon/profiles/default/GPUCache/data_1

.../etc/skel/.config/falkon/profiles/default/GPUCache/data_2

.../etc/skel/.config/falkon/profiles/default/GPUCache/data_3

...e/etc/skel/.config/falkon/profiles/default/GPUCache/index

...re/etc/skel/.config/falkon/profiles/default/Visited Links

...el/.config/falkon/profiles/default/adblock/customlist.txt

...skel/.config/falkon/profiles/default/adblock/easylist.txt