I have been cleaning up everything as the card got full, but now again after latest update I have under /boot:
vmlinux-4.10.10_1*
vmlinux-4.10.11_1*
vmlinux-rpi3*
System.map-4.10.10_1*
System.map-4.10.11_1*
config-4.10.10_1*
config-4.10.11_1*
And under /lib/modules:
4.10.10_1/
4.10.11_1/
The boot partition gets easily full if one does not frequently clean up and the module libraries are not small either. This is especially a problem when running from small SD cards.