Remove obsolete Group tag

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

rubygem-metaclass.spec

@@ -6,7 +6,6 @@ Summary: Adds a metaclass method to all Ruby objects
 Name: rubygem-%{gem_name}
 Version: 0.0.4
 Release: 7%{?dist}
-Group: Development/Languages
 # https://github.com/floehopper/metaclass/issues/1
 License: MIT
 URL: http://github.com/floehopper/metaclass
@@ -26,7 +25,6 @@ Adds a metaclass method to all Ruby objects
 
 %package doc
 Summary: Documentation for %{name}
-Group: Documentation
 Requires: %{name} = %{version}-%{release}
 BuildArch: noarch