Remove obsolete Group tag

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

rubygem-mocha.spec

@@ -5,7 +5,6 @@ Summary:        Mocking and stubbing library
 Name:           rubygem-%{gem_name}
 Version:        1.1.0
 Release:        7%{?dist}
-Group:          Development/Languages
 License:        MIT or Ruby or BSD
 URL:            http://gofreerange.com/mocha/docs
 Source0:        http://rubygems.org/gems/%{gem_name}-%{version}.gem
@@ -26,7 +25,6 @@ and stubbing of methods on real (non-mock) classes.
 
 %package doc
 Summary: Documentation for %{name}
-Group: Documentation
 Requires: %{name} = %{version}-%{release}
 BuildArch: noarch