Weird problem with deleted kernel

Hello, I deleted two old kernel with synaptic and now I see this in syslog.

ureadahead[279]: ureadahead:/lib/modprobe.d/blacklist_linux_4.4.0-57-generic.conf: No such file or directory ureadahead[279]: ureadahead:/lib/modprobe.d/blacklist_linux_4.4.0-59-generic.conf: No such file or directory

According to this:

I completely purged these kernel but I don’t understand why this appear in syslog.

(linux-headers-4.4.0-57 *59
linux-headers-4.4.0-57-generic *59
linux-image-4.4.0-57-generic *59
linux-image-extra-4.4.0-57-generic *59)

Distro: Ubuntu Mate 16.04.2
Desktop: MATE 1.16.1
Kernel: 4.4.0-63-generic

ureadahead’s database of files (a so called pack file) is out of date and contains paths to files already deleted. It will sort itself out in time, but if you are anxious to get rid of the error messages in journal (or syslog), you can let ureadahead re-generate the pack file:

Delete the file /var/lib/ureadahead/pack and reboot.

ureadahead will scan your disk during boot and messages from the scan process can be seen in journal. When done, you’ll find a fresh pack file in /var/lib/ureadahead.