Remove obsolete Group tag

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

umockdev.spec

@@ -3,7 +3,6 @@ Version:          0.11.3
 Release:          2%{?dist}
 Summary:          Mock hardware devices
 
-Group:            Development/Libraries
 License:          LGPLv2+
 URL:              https://github.com/martinpitt/%{name}
 Source0:          https://github.com/martinpitt/%{name}/archive/%{version}.tar.gz
@@ -26,7 +25,6 @@ hardware devices.
 
 %package devel
 Summary: Development packages for %{name}
-Group: Development/Libraries
 Requires: %{name}%{?_isa} = %{version}-%{release}
 
 %description devel