misc: cleanup useless resources

resources/icons/backup_24dp.svg

resources/icons/devices_24dp.svg

resources/icons/down_triangle_arrow_black_24dp.svg

resources/icons/extension_24dp.svg

resources/icons/groups_24dp.svg

resources/icons/insert_photo_24dp.svg

resources/icons/minimize.svg

resources/icons/my_location.svg

resources/icons/notification-bell-outline-edited.json

resources/icons/round_add_a_photo_24dp.svg

resources/icons/round_check_circle_24dp.svg

resources/icons/round_error_24dp.svg

resources/icons/router_24dp.svg

resources/icons/send_24dp.svg

resources/icons/spk_none_black_24dp.svg