Removed FileChangedReloadingStrategy class.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/trunk@1464705 13f79535-47bb-0310-9956-ffa450edef68
Removed FileConfiguration and ReloadingStrategy interfaces.

The handling of file-based configurations and reloading are now
implemented in a different way.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/trunk@1464706 13f79535-47bb-0310-9956-ffa450edef68