Remove obsolete Group tag

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

rubygem-deep_merge.spec

@@ -8,7 +8,6 @@ Name: rubygem-%{gem_name}
 Version: 1.2.1
 Release: 2%{?dist}
 Summary: Merge Deeply Nested Hashes
-Group: Development/Languages
 License: MIT
 URL: https://github.com/danielsdeleo/deep_merge
 Source0: https://rubygems.org/gems/%{gem_name}-%{version}.gem
@@ -27,7 +26,6 @@ Recursively merge hashes.
 
 %package doc
 Summary: Documentation for %{name}
-Group: Documentation
 Requires: %{name} = %{version}-%{release}
 BuildArch: noarch