Remove obsolete Group tag

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

rubygem-mime-types-data.spec

@@ -5,7 +5,6 @@ Name: rubygem-%{gem_name}
 Version: 3.2016.0521
 Release: 5%{?dist}
 Summary: A registry for information about MIME media type definitions
-Group: Development/Languages
 License: MIT
 URL: https://github.com/mime-types/mime-types-data/
 Source0: https://rubygems.org/gems/%{gem_name}-%{version}.gem
@@ -23,7 +22,6 @@ extensions to look up the likely MIME type definitions.
 
 %package doc
 Summary: Documentation for %{name}
-Group: Documentation
 Requires: %{name} = %{version}-%{release}
 BuildArch: noarch