Remove obsolete Group tag

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

rubygem-rb-inotify.spec

@@ -4,7 +4,6 @@ Name: rubygem-%{gem_name}
 Version: 0.9.7
 Release: 6%{?dist}
 Summary: A Ruby wrapper for Linux's inotify, using FFI
-Group: Development/Languages
 License: MIT
 URL: http://github.com/nex3/rb-inotify
 Source0: https://rubygems.org/gems/%{gem_name}-%{version}.gem
@@ -27,7 +26,6 @@ A Ruby wrapper for Linux's inotify, using FFI.
 
 %package doc
 Summary: Documentation for %{name}
-Group: Documentation
 Requires: %{name} = %{version}-%{release}
 BuildArch: noarch