Remove obsolete Group tag

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

imlib2.spec

@@ -3,7 +3,6 @@ Name:           imlib2
 Version:        1.4.9
 Release:        7%{?dist}
 License:        Imlib2
-Group:          System Environment/Libraries
 URL:            http://docs.enlightenment.org/api/imlib2/html/
 Source0:        http://downloads.sourceforge.net/enlightenment/%{name}-%{version}.tar.bz2
 # Fedora specific multilib hack, upstream should switch to pkgconfig one day
@@ -25,7 +24,6 @@ flexible.
 
 %package devel
 Summary:        Development package for %{name}
-Group:          Development/Libraries
 Requires:       %{name} = %{version}-%{release}
 Requires:       libX11-devel libXext-devel freetype-devel >= 2.1.9-4 pkgconfig
 
@@ -44,7 +42,6 @@ flexible.
 %package id3tag-loader
 Summary:        Imlib2 id3tag-loader
 License:        GPLv2+
-Group:          System Environment/Libraries
 Requires:       %{name} = %{version}-%{release}
 
 %description id3tag-loader