Remove obsolete Group tag

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

mythes.spec

@@ -3,7 +3,6 @@ Summary:   A thesaurus library
 Version:   1.2.4
 Release:   10%{?dist}
 Source:    http://downloads.sourceforge.net/hunspell/%{name}-%{version}.tar.gz
-Group:     System Environment/Libraries
 URL:       http://hunspell.sourceforge.net/
 License:   BSD and MIT
 BuildRequires: hunspell-devel, gcc-c++
@@ -16,7 +15,6 @@ information on part of speech, meanings, and synonyms.
 %package devel
 Requires: mythes = %{version}-%{release}, pkgconfig
 Summary: Files for developing with mythes
-Group: Development/Libraries
 
 %description devel
 Includes and definitions for developing with mythes