Don't set group tags

They are unused in Fedora.

gtkd.spec

@@ -33,7 +33,6 @@ De plus, gtkd fournit une API facile à utiliser.
 
 %package        devel
 Summary:        Support for developing gtkd application
-Group:          Development/Tools
 Requires:       %{name}%{?_isa} =  %{version}-%{release}
 
 %description devel
@@ -115,6 +114,7 @@ install -m0644 gtkd.d.tags %{buildroot}/%{_datadir}/geany/tags/
 * Wed Oct 26 2016 Kalev Lember <klember@redhat.com> - 3.3.1-2
 - Build vte bindings
 - Use license macro
+- Don't set group tags
 
 * Mon Oct 24 2016 Kalev Lember <klember@redhat.com> - 3.3.1-1
 - Update to 3.3.1