drop obsolete Group tags

libodfgen.spec

@@ -5,7 +5,6 @@ Version: 0.1.1
 Release: 1%{?dist}
 Summary: An ODF generator library
 
-Group: System Environment/Libraries
 License: LGPLv2+ or MPLv2.0
 URL: https://sourceforge.net/p/libwpd/wiki/libodfgen/
 Source: http://downloads.sourceforge.net/libwpd/%{name}-%{version}.tar.xz
@@ -21,7 +20,6 @@ libreoffice or calligra, for example.
 
 %package devel
 Summary: Development files for %{name}
-Group: Development/Libraries
 Requires: %{name}%{?_isa} = %{version}-%{release}
 
 %description devel
@@ -30,7 +28,6 @@ developing applications that use %{name}.
 
 %package doc
 Summary: Documentation of %{name} API
-Group: Documentation
 BuildArch: noarch
 
 %description doc