Remove obsolete Group tag

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

flac.spec

@@ -10,7 +10,6 @@ Name: flac
 Version: 1.3.2
 Release: 8%{?dist}
 License: BSD and GPLv2+ and GFDL
-Group: Applications/Multimedia
 Source0: http://downloads.xiph.org/releases/flac/flac-%{version}.tar.xz
 URL: http://www.xiph.org/flac/
 # use our CFLAGS and don't force SSE intrinsics
@@ -42,7 +41,6 @@ This package contains the command-line tools and documentation.
 
 %package libs
 Summary: Libraries for the Free Lossless Audio Codec
-Group: System Environment/Libraries
 Obsoletes: flac < 1.2.1-11
 
 %description libs
@@ -56,7 +54,6 @@ This package contains the FLAC libraries.
 
 %package devel
 Summary: Development libraries and header files from FLAC
-Group: Development/Libraries
 Requires: %{name}-libs%{?_isa} = %{version}-%{release}
 Requires: pkgconfig