Remove obsolete Group tag

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

libtimezonemap.spec

@@ -3,7 +3,6 @@ Version:        0.4.5.1
 Release:        4%{?dist}
 Summary:        Time zone map widget for Gtk+
 
-Group:          System Environment/Libraries
 License:        GPLv3
 URL:            https://launchpad.net/timezonemap
 Source0:        https://github.com/dashea/timezonemap/archive/%{version}.tar.gz
@@ -26,7 +25,6 @@ panel, which was itself a fork of Ubiquity's timezone map.
 
 %package devel
 Summary:        Development files for %{name}
-Group:          Development/Libraries
 Requires:       %{name}%{?_isa} = %{version}-%{release}
 
 %description devel