Remove obsolete Group tag

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

rubygem-cucumber.spec

@@ -6,7 +6,6 @@ Name: rubygem-%{gem_name}
 Version: 3.1.2
 Release: 3%{?dist}
 Summary: Tool to execute plain-text documents as functional tests
-Group: Development/Languages
 License: MIT
 URL: https://cucumber.io/
 Source0: https://rubygems.org/gems/%{gem_name}-%{version}.gem
@@ -48,7 +47,6 @@ language and serves as documentation, automated tests and development-aid.
 
 %package doc
 Summary: Documentation for %{name}
-Group: Documentation
 Requires: %{name} = %{version}-%{release}
 BuildArch: noarch