Remove obsolete Group tag

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

libkni3.spec

@@ -3,7 +3,6 @@ Version:        3.9.2
 Release:        40%{?dist}
 Summary:        C++ KNI library v3 for the Katana 300 robot arm
 
-Group:          System Environment/Libraries
 License:        GPLv2+
 URL:            http://www.neuronics.ch/cms_de/web/index.php?id=386
 Source0:        http://www.neuronics.ch/cms_de/mediabase/KNI_3.9.2.tar.gz
@@ -39,7 +38,6 @@ newer robots use libkni (version 4 and above).
 
 %package        devel
 Summary:        Development files for %{name}
-Group:          Development/Libraries
 Requires:       %{name} = %{version}-%{release}
 Requires:       pkgconfig
 
@@ -50,7 +48,6 @@ developing applications that use %{name}.
 
 %package        static
 Summary:        Static libraries for %{name}
-Group:          Development/Libraries
 Requires:       %{name}-devel = %{version}-%{release}
 
 %description    static
@@ -60,7 +57,6 @@ compile static binaries using %{name}.
 
 %package        doc
 Summary:        Documentation for %{name}
-Group:          Documentation
 BuildArch:      noarch
 
 %description    doc
@@ -68,7 +64,6 @@ This package contains the documentation for developing with %{name}.
 
 %package        examples
 Summary:        Example applications for %{name}
-Group:          Applications/System
 Requires:       %{name} = %{version}-%{release}
 
 %description    examples