Clean configuration file on upgrade

[Timo Jyrinki]

From packaging review: unity-system-compositor: new version removes /etc/lightdm/lightdm.conf.d/10-unity-system-compositor.conf, that needs a corresponding .maintscripts to clean it up on upgrade

This is related to this commit where the configuration file was moved from package to another: http://bazaar.launchpad.net/~unity-system-compositor-team/unity-system-compositor/trunk/revision/96

[PS Jenkins bot (ps-jenkins)]

Fix committed into lp:unity-system-compositor at revision 101, scheduled for release in unity-system-compositor, milestone Unknown

[Launchpad Janitor (janitor)]

This bug was fixed in the package unity-system-compositor - 0.0.2+14.04.20131120.1-0ubuntu1

---------------
unity-system-compositor (0.0.2+14.04.20131120.1-0ubuntu1) trusty; urgency=low

  [ Michael Terry ]
  * Bump version to 0.0.2, so we can reference it in debian/control
  * Default to a public file socket, if one is used.
  * Clean some lintian warnings.
  * Add DBus interface for com.canonical.Unity.Screen to USC.

  [ Alan Griffiths ]
  * Use the Mir libraries detected by pkg_check_modules

  [ Timo Jyrinki ]
  * Clean the moved conffile when upgrading from previous version. (LP:
    #1253008). (LP: #1253008)

  [ Kevin Gunn ]
  * mir server abi and api broke, updating dependency to deb 0.1.1

  [ Robert Bruce Park ]
  * Stop depending on libboost-all-dev, it is verboten.

  [ Ubuntu daily release ]
  * Automatic snapshot from revision 101
 -- Ubuntu daily release <email address hidden> Wed, 20 Nov 2013 11:17:20 +0000