Remove obsolete Group tag

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

libcddb.spec

@@ -3,7 +3,6 @@ Name:		libcddb
 Version:	1.3.2
 Release:	28%{?dist}
 License:	LGPLv2+
-Group:		System Environment/Libraries
 URL:		http://libcddb.sourceforge.net/
 Source0:	http://downloads.sourceforge.net/libcddb/%{name}-%{version}.tar.bz2
 Patch0:		libcddb-1.3.0-multilib.patch
@@ -18,7 +17,6 @@ HTTP, SMTP) to access data on a CDDB server (e.g http://freedb.org/).
 
 %package devel
 Summary:	Development files for libcddb
-Group:		Development/Libraries
 Requires:	%{name}%{?_isa} = %{version}-%{release}
 
 %description devel