Remove obsolete Group tag

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

booth.spec

@@ -59,7 +59,6 @@ Name:           booth
 Version:        %{boothver}
 Release:        %{boothrel}%{dist}
 Summary:        Ticket Manager for Multi-site Clusters
-Group:          System Environment/Daemons
 License:        GPLv2+
 Url:            https://github.com/%{github_owner}/%{name}
 Source0:        https://github.com/%{github_owner}/%{name}/archive/%{commit}/%{name}-%{shortcommit}.tar.gz
@@ -124,7 +123,6 @@ clustering in Pacemaker.
 
 %package        core
 Summary:        Booth core files (executables, etc.)
-Group:          System Environment/Daemons
 # for booth-keygen (chown, dd)
 Requires:       coreutils
 # deal with pre-split arrangement
@@ -136,7 +134,6 @@ multi-site clusters.
 
 %package        arbitrator
 Summary:        Booth support for running as an arbitrator
-Group:          System Environment/Daemons
 BuildArch:      noarch
 Requires:       %{name}-core = %{version}-%{release}
 %{?systemd_requires}
@@ -158,7 +155,6 @@ as an arbitrator.
 
 %package        site
 Summary:        Booth support for running as a full-fledged site
-Group:          System Environment/Daemons
 BuildArch:      noarch
 Requires:       %{name}-core = %{version}-%{release}
 # for crm_{resource,simulate,ticket} utilities
@@ -174,7 +170,6 @@ as a full-fledged site.
 
 %package        test
 Summary:        Test scripts for Booth
-Group:          System Environment/Daemons
 BuildArch:      noarch
 # runtests.py suite (for hostname and killall respectively)
 Requires:       hostname psmisc