Remove obsolete Group tag

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

rubygem-httpclient.spec

@@ -6,7 +6,6 @@ Summary:        HTTP Client interface for ruby
 Name:           rubygem-%{gem_name}
 Version:        2.8.0
 Release:        5%{?dist}
-Group:          Development/Languages
 License:        (Ruby or BSD) and Public Domain
 URL:            https://github.com/nahi/httpclient
 Source0:        http://gems.rubyforge.org/gems/%{gem_name}-%{version}.gem
@@ -34,7 +33,6 @@ an interface to HTTP Client for the ruby language
 
 %package doc
 Summary:   Documentation for %{name}
-Group:     Documentation
 Requires:  %{name} = %{version}-%{release}
 BuildArch: noarch