Remove obsolete Group tag

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

libvisual.spec

@@ -5,7 +5,6 @@ Version:        0.4.0
 Release:        25%{?dist}
 Epoch:		1
 Summary:        Abstraction library for audio visualisation plugins
-Group:          Applications/Multimedia
 License:        LGPLv2+
 URL:            http://libvisual.sf.net
 Source0:        http://dl.sf.net/libvisual/libvisual-%{version}.tar.gz
@@ -31,7 +30,6 @@ anywhere he wants.
 
 %package        devel
 Summary:        Development files for libvisual
-Group:          Development/Libraries
 Requires:       %{name}%{?_isa} = %{epoch}:%{version}-%{release}
 
 %description    devel