Don't set group tags

There are unused in Fedora.

cogl.spec

@@ -9,7 +9,6 @@ Version:       1.22.2
 Release:       1%{?dist}
 Summary:       A library for using 3D graphics hardware to draw pretty pictures
 
-Group:         Development/Libraries
 License:       LGPLv2+
 URL:           http://www.clutter-project.org/
 Source0:       http://download.gnome.org/sources/cogl/1.22/cogl-%{version}.tar.xz
@@ -62,7 +61,6 @@ options we are interested in for the future.
 
 %package devel
 Summary:       %{name} development environment
-Group:         Development/Libraries
 Requires:      %{name}%{?_isa} = %{version}-%{release}
 
 %description devel
@@ -70,7 +68,6 @@ Header files and libraries for building and developing apps with %{name}.
 
 %package       doc
 Summary:       Documentation for %{name}
-Group:         Documentation
 Requires:      %{name} = %{version}-%{release}
 BuildArch:     noarch
 
@@ -80,7 +77,6 @@ This package contains documentation for %{name}.
 %if 0%{?with_tests}
 %package       tests
 Summary:       Tests for %{name}
-Group:         Development/Tools
 
 %description   tests
 This package contains the installable tests for %{cogl}.
@@ -155,6 +151,7 @@ chrpath --delete $RPM_BUILD_ROOT%{_libdir}/libcogl-pango.so
 %changelog
 * Fri Aug 26 2016 Kalev Lember <klember@redhat.com> - 1.22.2-1
 - Update to 1.22.2
+- Don't set group tags
 
 * Wed Feb 03 2016 Fedora Release Engineering <releng@fedoraproject.org> - 1.22.0-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_24_Mass_Rebuild