Remove obsolete Group tag

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

libqb.spec

@@ -5,7 +5,6 @@ Version:        1.0.3
 Release:        5%{?dist}
 Summary:        An IPC library for high performance servers
 
-Group:          System Environment/Libraries
 License:        LGPLv2+
 URL:            https://github.com/ClusterLabs/libqb
 Source0:        https://github.com/ClusterLabs/libqb/releases/download/v%{version}/%{name}-%{version}.tar.xz
@@ -51,7 +50,6 @@ rm -rf $RPM_BUILD_ROOT/%{_docdir}/*
 
 %package        devel
 Summary:        Development files for %{name}
-Group:          Development/Libraries
 Requires:       %{name}%{?_isa} = %{version}-%{release}
 Requires:       pkgconfig