Remove obsolete Group tag

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

libIDL.spec

@@ -5,7 +5,6 @@ Release: 16%{?dist}
 URL: http://ftp.gnome.org/pub/gnome/sources/libIDL/0.8/
 Source: http://download.gnome.org/sources/libIDL/0.8/%{name}-%{version}.tar.bz2
 Patch0: libIDL-0.8.6-multilib.patch
-Group: System Environment/Libraries
 License: LGPLv2+
 BuildRequires:  gcc
 BuildRequires: pkgconfig >= 0.8
@@ -18,7 +17,6 @@ It can be used for both COM-style and CORBA-style IDL.
 
 %package devel
 Summary: Development libraries and header files for libIDL
-Group: Development/Libraries
 Requires: %{name} = %{version}-%{release}
 Requires: pkgconfig >= 1:0.8
 Requires: glib2-devel >= 2.0