Remove obsolete Group tag

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

soundtouch.spec

@@ -3,7 +3,6 @@ Version:        2.1.1
 Release:        1%{?dist}
 Summary:        Audio Processing library for changing Tempo, Pitch and Playback Rates
 License:        LGPLv2+
-Group:          System Environment/Libraries
 URL:            http://www.surina.net/soundtouch/
 Source0:        https://gitlab.com/soundtouch/soundtouch/-/archive/%{version}/%{name}-%{version}.tar.gz
 BuildRequires:  gcc-c++
@@ -23,7 +22,6 @@ command-line interface.
 
 %package devel
 Summary:  Libraries, includes, etc to develop soundtouch applications
-Group:    Development/Libraries
 Requires: soundtouch = %{version}-%{release}
 Requires: pkgconfig