Remove obsolete Group tag

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

dlm.spec

@@ -3,7 +3,6 @@ Version:        4.0.6
 Release:        9%{?dist}
 License:        GPLv2 and GPLv2+ and LGPLv2+
 # For a breakdown of the licensing, see README.license
-Group:          System Environment/Kernel
 Summary:        dlm control daemon and tool
 URL:            https://fedorahosted.org/cluster
 BuildRequires:  gcc
@@ -77,7 +76,6 @@ install -Dm 0644 init/dlm.sysconfig %{buildroot}/etc/sysconfig/dlm
 
 %package        lib
 Summary:        Library for %{name}
-Group:          System Environment/Libraries
 Conflicts:      clusterlib
 
 %description    lib
@@ -92,7 +90,6 @@ from userland applications.
 
 %package        devel
 Summary:        Development files for %{name}
-Group:          Development/Libraries
 Requires:       %{name}-lib = %{version}-%{release}
 Conflicts:      clusterlib-devel