Remove obsolete Group tag

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

mtr.spec

@@ -5,7 +5,6 @@ Name: mtr
 Version: 0.92
 Release: 3%{?dist}
 Epoch: 2
-Group: Applications/Internet
 License: GPLv2
 URL: https://www.bitwizard.nl/mtr/
 Source0: https://github.com/traviscross/mtr/archive/v%{version}/%{name}-%{version}.tar.gz
@@ -33,7 +32,6 @@ in the mtr-gtk package).
 
 %package gtk
 Summary: GTK+ interface for MTR
-Group: Applications/Internet
 Requires: %{name} = %{epoch}:%{version}-%{release}
 
 %description gtk