Remove 2.8 and dual boot 3.4 with Ubuntu

[phil66]

ray[member=5018]Ray[/member]-Kudu-Pro:~$ ls -la /etc/grub.d
total 96
drwxr-xr-x  2 root root  4096 Jun 16 20:53 .
drwxr-xr-x 146 root root 12288 Jul  1 09:29 ..
-rwxr-xr-x  1 root root  9791 Dec 19  2015 00_header
-rwxr-xr-x  1 root root  6258 Mar 15  2016 05_debian_theme
-rwxr-xr-x  1 root root 12512 Mar  1 14:52 10_linux
-rwxr-xr-x  1 root root 11082 Jun 17  2016 20_linux_xen
-rwxr-xr-x  1 root root  1992 Mar 12  2014 20_memtest86+
-rw-r--r--  1 root root 11692 Apr 11  2014 30_os-prober
-rwxr-xr-x  1 root root  1418 Jun 17  2016 30_uefi-firmware
-rwxr-xr-x  1 root root  905 Mar  5 20:09 40_custom
-rwxr-xr-x  1 root root  216 Apr 11  2014 41_custom
-rw-r--r--  1 root root  483 Apr 11  2014 README
ray[member=5018]Ray[/member]-Kudu-Pro:~$