Remove obsolete Group tag

References: https://fedoraproject.org/wiki/Changes/Remove_Group_Tag

rubygem-rdiscount.spec

@@ -4,7 +4,6 @@ Summary: Converts documents in Markdown syntax to HTML
 Name: rubygem-%{gem_name}
 Version: 2.2.0.1
 Release: 4%{?dist}
-Group: Development/Languages
 License: ASL 1.1
 URL: http://github.com/rtomayko/rdiscount
 Source0: http://rubygems.org/gems/%{gem_name}-%{version}.gem
@@ -22,7 +21,6 @@ BuildRequires: gcc
 
 %package doc
 Summary: Documentation for %{name}
-Group: Documentation
 BuildArch: noarch
 Requires: %{name} = %{version}-%{release}