build: remove source from spec

Author: alvarolopez

packaging/redhat/caso.spec

@@ -5,7 +5,6 @@ Summary:     cASO is an OpenStack Accounting extractor
 
 License:     ASL 2.0
 URL:         https://github.com/IFCA/caso
-Source0:      https://github.com/IFCA/caso/caso-%{version}.tar.gz
 
 BuildArch: noarch
 BuildRequires: python3-devel