Running "sudo nano /var/usr/dpkg/info/xserver-common-lts-raring.postrm" should open the file in a command line text editor. Use arrow keys to navigate to the line that includes "dpkg divert" and erase that line using your backspace/delete key.
You will want to run "sudo apt-get autoremove" in order to remove xserver-common-lts-raring.
One question though, what Ubuntu release are you using?
Running "sudo nano /var/usr/ dpkg/info/ xserver- common- lts-raring. postrm" should open the file in a command line text editor. Use arrow keys to navigate to the line that includes "dpkg divert" and erase that line using your backspace/delete key.
You will want to run "sudo apt-get autoremove" in order to remove xserver- common- lts-raring.
One question though, what Ubuntu release are you using?