Drop the load_from_disk script
    
    This script is quite specific to loading Fedora-specific projects into
    a pagure database and was meant to be used to populate the dist-git
    database.
    So this file is removed from the pagure project but will be added and
    adjusted to the pagure-dist-git project.
    
    Signed-off-by: Pierre-Yves Chibon <pingou@pingoured.fr>