Remove obsolete Group tag

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

rubygem-open4.spec

@@ -4,7 +4,6 @@ Summary: Manage child processes and their IO handles easily
 Name: rubygem-%{gem_name}
 Version: 1.3.4
 Release: 7%{?dist}
-Group: Development/Languages
 License: BSD or Ruby
 URL: http://github.com/ahoward/open4/
 Source0: https://rubygems.org/gems/%{gem_name}-%{version}.gem
@@ -18,7 +17,6 @@ Manage child processes and their IO handles easily.
 
 %package doc
 Summary: Documentation for %{name}
-Group: Documentation
 Requires:%{name} = %{version}-%{release}
 
 %description doc