Remove obsolete Group tag

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

wavpack.spec

@@ -3,7 +3,6 @@ Summary:	A completely open audiocodec
 Version:	5.1.0
 Release:	9%{?dist}
 License:	BSD
-Group:		Applications/Multimedia
 Url:		http://www.wavpack.com/
 Source:		http://www.wavpack.com/%{name}-%{version}.tar.bz2
 Patch1:		wavpack-0001-issue-27-do-not-overwrite-stack-on-corrupt-RF64-file.patch
@@ -25,7 +24,6 @@ performance and functionality.
 
 %package devel
 Summary:	WavPack - development files
-Group:		Development/Libraries
 Requires:	%{name}%{?_isa} = %{version}-%{release}
 Requires:	pkgconfig