Remove obsolete Group tag

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

popt.spec

@@ -3,7 +3,6 @@ Name:		popt
 Version:	1.16
 Release:	16%{?dist}
 License:	MIT
-Group:		System Environment/Libraries
 URL:		http://www.rpm5.org/
 Source:		http://www.rpm5.org/files/%{name}/%{name}-%{version}.tar.gz
 Patch0:		popt-1.16-pkgconfig.patch
@@ -26,7 +25,6 @@ shell-like rules.
 
 %package devel
 Summary:	Development files for the popt library
-Group:		Development/Libraries
 Requires:	%{name}%{?_isa} = %{version}-%{release}, pkgconfig
 
 %description devel
@@ -36,7 +34,6 @@ API documentation of the popt library, too.
 
 %package static
 Summary:	Static library for parsing command line parameters
-Group:		Development/Libraries
 Requires:	%{name}-devel%{?_isa} = %{version}-%{release}
 
 %description static