notification light clean up

Credits:@Altaf-Mahdi

Revert "Add back notification light settings."

This reverts commit 2d6bc93cb5f72086f5a1b60a159aa2aa5e989c8f

Revert " Fix: app icon sizes in notification lights "

This reverts commit 42d02a7e05ea8519d3491733d0d5265801a813da