jacob@Gandalf:~$ sudo dpkg  -P linux-generic-lts-utopic linux-generic linux-image-generic linux-image-4.4.0-72-generic  linux-image-extra-4.4.0-72-generic
(Reading database ... 300979 files and directories currently installed.)
Removing linux-generic-lts-utopic (4.4.0.83.89) ...
Removing linux-generic (4.4.0.72.78) ...
Removing linux-image-generic (4.4.0.72.78) ...
Removing linux-image-extra-4.4.0-72-generic (4.4.0-72.93) ...
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 4.4.0-72-generic /boot/vmlinuz-4.4.0-72-generic
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 4.4.0-72-generic /boot/vmlinuz-4.4.0-72-generic
update-initramfs: Generating /boot/initrd.img-4.4.0-72-generic
W: mdadm: the array /dev/md125 with UUID 847f15bc:a3cfe7dc:dcbccf04:78d5cc64
W: mdadm: is currently active, but it is not listed in mdadm.conf. if
W: mdadm: it is needed for boot, then YOUR SYSTEM IS NOW UNBOOTABLE!
W: mdadm: please inspect the output of /usr/share/mdadm/mkconf, compare
W: mdadm: it to /etc/mdadm/mdadm.conf, and make the necessary changes.
run-parts: executing /etc/kernel/postinst.d/pm-utils 4.4.0-72-generic /boot/vmlinuz-4.4.0-72-generic
run-parts: executing /etc/kernel/postinst.d/unattended-upgrades 4.4.0-72-generic /boot/vmlinuz-4.4.0-72-generic
run-parts: executing /etc/kernel/postinst.d/update-notifier 4.4.0-72-generic /boot/vmlinuz-4.4.0-72-generic
run-parts: executing /etc/kernel/postinst.d/zz-update-grub 4.4.0-72-generic /boot/vmlinuz-4.4.0-72-generic
Generating grub configuration file ...
grub-probe: error: disk `mduuid/847f15bca3cfe7dcdcbccf0478d5cc64,1' not found.
run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 1
dpkg: error processing package linux-image-extra-4.4.0-72-generic (--purge):
 subprocess installed post-removal script returned error exit status 1
Removing linux-image-4.4.0-72-generic (4.4.0-72.93) ...
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/initramfs-tools 4.4.0-72-generic /boot/vmlinuz-4.4.0-72-generic
update-initramfs: Deleting /boot/initrd.img-4.4.0-72-generic
run-parts: executing /etc/kernel/postrm.d/zz-update-grub 4.4.0-72-generic /boot/vmlinuz-4.4.0-72-generic
Generating grub configuration file ...
grub-probe: error: disk `mduuid/847f15bca3cfe7dcdcbccf0478d5cc64,1' not found.
run-parts: /etc/kernel/postrm.d/zz-update-grub exited with return code 1
Failed to process /etc/kernel/postrm.d at /var/lib/dpkg/info/linux-image-4.4.0-72-generic.postrm line 328.
dpkg: error processing package linux-image-4.4.0-72-generic (--purge):
 subprocess installed post-removal script returned error exit status 1
Errors were encountered while processing:
 linux-image-extra-4.4.0-72-generic
 linux-image-4.4.0-72-generic