One step further...

root@localhost:/boot# ls
abi-4.4.0-21-generic         initrd.img-4.4.0-66-generic
abi-4.4.0-59-generic         initrd.img-4.4.0-67-generic
abi-4.4.0-62-generic         initrd.img-4.4.0-70-generic
abi-4.4.0-63-generic         initrd.img-4.4.0-71-generic
abi-4.4.0-64-generic         initrd.img-4.4.0-72-generic
abi-4.4.0-66-generic         lost+found
abi-4.4.0-67-generic         System.map-4.4.0-21-generic
abi-4.4.0-70-generic         System.map-4.4.0-59-generic
abi-4.4.0-71-generic         System.map-4.4.0-62-generic
abi-4.4.0-72-generic         System.map-4.4.0-63-generic
config-4.4.0-21-generic      System.map-4.4.0-64-generic
config-4.4.0-59-generic      System.map-4.4.0-66-generic
config-4.4.0-62-generic      System.map-4.4.0-67-generic
config-4.4.0-63-generic      System.map-4.4.0-70-generic
config-4.4.0-64-generic      System.map-4.4.0-71-generic
config-4.4.0-66-generic      System.map-4.4.0-72-generic
config-4.4.0-67-generic      vmlinuz-4.4.0-21-generic
config-4.4.0-70-generic      vmlinuz-4.4.0-59-generic
config-4.4.0-71-generic      vmlinuz-4.4.0-62-generic
config-4.4.0-72-generic      vmlinuz-4.4.0-63-generic
grub                         vmlinuz-4.4.0-64-generic
initrd.img-4.4.0-21-generic  vmlinuz-4.4.0-66-generic
initrd.img-4.4.0-59-generic  vmlinuz-4.4.0-67-generic
initrd.img-4.4.0-62-generic  vmlinuz-4.4.0-70-generic
initrd.img-4.4.0-63-generic  vmlinuz-4.4.0-71-generic
initrd.img-4.4.0-64-generic  vmlinuz-4.4.0-72-generic
root@localhost:/boot# rm abi-4.4.0-59-generic
root@localhost:/boot# df
Filesystem            1K-blocks    Used Available Use% Mounted on
udev                     485072       0    485072   0% /dev
tmpfs                    100724   10732     89992  11% /run
/dev/mapper/vg00-lv01  49011528 7268244  39545692  16% /
tmpfs                    503620       0    503620   0% /dev/shm
tmpfs                      5120       0      5120   0% /run/lock
tmpfs                    503620       0    503620   0% /sys/fs/cgroup
/dev/sda1                474730  465740         0 100% /boot
root@localhost:/boot# rm config-4.4.0-59-generic
root@localhost:/boot# rm initrd.img-4.4.0-59-generic
root@localhost:/boot# rm vmlinuz-4.4.0-59-generic
root@localhost:/boot# df
Filesystem            1K-blocks    Used Available Use% Mounted on
udev                     485072       0    485072   0% /dev
tmpfs                    100724   10732     89992  11% /run
/dev/mapper/vg00-lv01  49011528 7268244  39545692  16% /
tmpfs                    503620       0    503620   0% /dev/shm
tmpfs                      5120       0      5120   0% /run/lock
tmpfs                    503620       0    503620   0% /sys/fs/cgroup
/dev/sda1                474730  424934     20766  96% /boot
root@localhost:/boot# reboot
packet_write_wait: Connection to 82.223.16.48 port 22: Broken pipe
MacBook-Pro:~ PBRIERE$ ssh [email protected]
[email protected]'s password:
Welcome to Ubuntu 16.04.1 LTS (GNU/Linux 4.4.0-72-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage
Last login: Mon May  1 14:58:06 2017 from 88.166.88.153
<login>:~# apt autoclean && sudo apt autoremove
Reading package lists... Done
Building dependency tree
Reading state information... Done
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt-get -f install' to correct these.
The following packages have unmet dependencies:
 linux-image-extra-4.4.0-75-generic : Depends: linux-image-4.4.0-75-generic but it is not installed
 linux-image-generic : Depends: linux-image-4.4.0-75-generic but it is not installed
                       Recommends: thermald but it is not installed
E: Unmet dependencies. Try using -f.
<login>:~# apt-get -f install
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following packages were automatically installed and are no longer required:
  libcurl3 libdrm-amdgpu1 libdrm-intel1 libdrm-nouveau2 libdrm-radeon1 libdrm2
  libelf1 libfile-basedir-perl libfile-desktopentry-perl libfile-mimeinfo-perl
  libfontenc1 libfpdf-tpl-php libfpdi-php libgl1-mesa-dri libgl1-mesa-glx
  libglapi-mesa libice6 libipc-system-simple-perl libjs-excanvas
  libjs-jquery-cookie libjs-jquery-flot libjs-jquery-ui libllvm3.8
  libnet-dbus-perl libnusoap-php libpciaccess0 libphp-adodb libsm6
  libtie-ixhash-perl libtxc-dxtn-s2tc0 libx11-protocol-perl libx11-xcb1
  libxaw7 libxcb-dri2-0 libxcb-dri3-0 libxcb-glx0 libxcb-present0
  libxcb-shape0 libxcb-sync1 libxcomposite1 libxcursor1 libxdamage1 libxfixes3
  libxft2 libxi6 libxinerama1 libxml-parser-perl libxml-twig-perl
  libxml-xpathengine-perl libxmu6 libxrandr2 libxrender1 libxshmfence1 libxt6
  libxtst6 libxv1 libxxf86dga1 libxxf86vm1 linux-headers-4.4.0-59
  linux-headers-4.4.0-59-generic linux-headers-4.4.0-62
  linux-headers-4.4.0-62-generic linux-headers-4.4.0-63
  linux-headers-4.4.0-63-generic linux-headers-4.4.0-64
  linux-headers-4.4.0-64-generic linux-headers-4.4.0-66
  linux-headers-4.4.0-66-generic linux-headers-4.4.0-67
  linux-headers-4.4.0-67-generic linux-headers-4.4.0-70
  linux-headers-4.4.0-70-generic linux-image-4.4.0-59-generic
  linux-image-4.4.0-62-generic linux-image-4.4.0-63-generic
  linux-image-4.4.0-64-generic linux-image-4.4.0-66-generic
  linux-image-4.4.0-67-generic linux-image-4.4.0-70-generic
  linux-image-extra-4.4.0-59-generic linux-image-extra-4.4.0-62-generic
  linux-image-extra-4.4.0-63-generic linux-image-extra-4.4.0-64-generic
  linux-image-extra-4.4.0-66-generic linux-image-extra-4.4.0-67-generic
  linux-image-extra-4.4.0-70-generic php-curl php-fpdf php-ldap php-mail-mime
  php-pclzip php7.0-curl php7.0-ldap x11-common x11-utils x11-xserver-utils
  xdg-utils
Use 'apt autoremove' to remove them.
The following additional packages will be installed:
  linux-image-4.4.0-75-generic
Suggested packages:
  fdutils linux-doc-4.4.0 | linux-source-4.4.0 linux-tools
The following NEW packages will be installed:
  linux-image-4.4.0-75-generic
0 upgraded, 1 newly installed, 0 to remove and 91 not upgraded.
8 not fully installed or removed.
Need to get 0 B/21.9 MB of archives.
After this operation, 66.8 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
(Reading database ... 393680 files and directories currently installed.)
Preparing to unpack .../linux-image-4.4.0-75-generic_4.4.0-75.96_amd64.deb ...
Done.
Unpacking linux-image-4.4.0-75-generic (4.4.0-75.96) ...
Setting up linux-image-4.4.0-75-generic (4.4.0-75.96) ...
Running depmod.
update-initramfs: deferring update (hook will be called later)
Examining /etc/kernel/postinst.d.
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 4.4.0-75-generic /boot/vmlinuz-4.4.0-75-generic
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 4.4.0-75-generic /boot/vmlinuz-4.4.0-75-generic
update-initramfs: Generating /boot/initrd.img-4.4.0-75-generic

gzip: stdout: No space left on device
E: mkinitramfs failure cpio 141 gzip 1
update-initramfs: failed for /boot/initrd.img-4.4.0-75-generic with 1.
run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1
Failed to process /etc/kernel/postinst.d at /var/lib/dpkg/info/linux-image-4.4.0-75-generic.postinst line 1052.
dpkg: error processing package linux-image-4.4.0-75-generic (--configure):
 subprocess installed post-installation script returned error exit status 2
dpkg: dependency problems prevent configuration of linux-image-extra-4.4.0-75-generic:
 linux-image-extra-4.4.0-75-generic depends on linux-image-4.4.0-75-generic; however:
  Package linux-image-4.4.0-75-generic is not configured yet.

dpkg: error processing package linux-image-extra-4.4.0-75-generic (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of linux-image-generic:
 linux-image-generic depends on linux-image-4.4.0-75-generic; however:
  Package linux-image-4.4.0-75-generic is not configured yet.
 linux-image-generic depends on linux-image-extra-4.4.0-75-generic; however:
  Package linux-image-extra-4.4.0-75-generic is not configured yet.

dpkg: error processing package linux-image-generic (--configure):
 dependency problems - leaving unconfigured
Setting up linux-headers-4.4.0-75 (4.4.0-75.96) ...
Setting up linux-headers-4.4.0-75-generic (4.4.0-75.96) ...
Setting up linux-headers-generic (4.4.0.75.81) ...
dpkg: dependency problems prevent configuration of linux-generic:
 linux-generic depends on linux-image-generic (= 4.4.0.75.81); however:
  Package linux-image-generic is not configured yet.

dpkg: error processing package linux-generic (--configure):
 dependency problems - leaving unconfigured
Setting up 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

gzip: stdout: No space left on device
E: mkinitramfs failure cpio 141 gzip 1
update-initramfs: failed for /boot/initrd.img-4.4.0-72-generic with 1.
run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1
dpkg: error processing package linux-image-extra-4.4.0-72-generic (--configure):
 subprocess installed post-installation script returned error exit status 1
Setting up linux-libc-dev:amd64 (4.4.0-75.96) ...
Errors were encountered while processing:
 linux-image-4.4.0-75-generic
 linux-image-extra-4.4.0-75-generic
 linux-image-generic
 linux-generic
 linux-image-extra-4.4.0-72-generic
E: Sub-process /usr/bin/dpkg returned an error code (1)