Remove obsolete Group tag

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

perl-Lingua-Stem-Ru.spec

@@ -3,7 +3,6 @@ Version:        0.04
 Release:        8%{?dist}
 Summary:        Porter's stemming algorithm for Russian (KOI8-R only)
 License:        GPL+ or Artistic
-Group:          Development/Libraries
 URL:            https://metacpan.org/release/Lingua-Stem-Ru
 Source0:        https://cpan.metacpan.org/authors/id/N/NE/NEILB/Lingua-Stem-Ru-%{version}.tar.gz
 BuildArch:      noarch