Remove obsolete Group tag

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

libiec61883.spec

@@ -3,7 +3,6 @@ Name:           libiec61883
 Version:        1.2.0
 Release:        20%{?dist}
 License:        LGPLv2+
-Group:          System Environment/Libraries
 Source:         http://www.kernel.org/pub/linux/libs/ieee1394/%{name}-%{version}.tar.gz
 # Fedora specific patches.
 
@@ -25,7 +24,6 @@ down to isochronous packets, which are transmitted using libraw1394.
 
 %package devel
 Summary:        Development files for libiec61883
-Group:          Development/Libraries
 Requires:       %{name} = %{version}-%{release}
 
 %description devel
@@ -33,7 +31,6 @@ Development files needed to build applications against libiec61883
 
 %package utils
 Summary:        Utilities for use with libiec61883
-Group:          Applications/Multimedia
 Requires:       %{name} = %{version}-%{release}
 
 %description utils