Remove obsolete Group tag

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

ldns.spec

@@ -48,7 +48,6 @@ Patch1: ldns-1.7.0-multilib.patch
 Patch2: ldns-1.7.0-parse-limit.patch
 Patch3: ldns-1.7.0-realloc.patch
 
-Group: System Environment/Libraries
 # Only needed for builds from svn snapshot
 %if 0%{snapshot}
 BuildRequires: libtool
@@ -90,7 +89,6 @@ packets.
 
 %package devel
 Summary: Development package that includes the ldns header files
-Group: Development/Libraries
 Requires: %{name}%{?_isa} = %{version}-%{release}
 Requires: pkgconfig openssl-devel
 
@@ -99,7 +97,6 @@ The devel package contains the ldns library and the include files
 
 %package utils
 Summary: DNS(SEC) utilities for querying dns
-Group: Applications/System
 Requires: %{name}%{?_isa} = %{version}-%{release}
 
 %description utils
@@ -109,7 +106,6 @@ Collection of tools to get, check or alter DNS(SEC) data.
 %if %{with python2}
 %package -n python2-ldns
 Summary: Python2 extensions for ldns
-Group: Applications/System
 Requires: %{name}%{?_isa} = %{version}-%{release}
 %{?python_provide:%python_provide python2-ldns}
 
@@ -121,7 +117,6 @@ Python2 extensions for ldns
 %if %{with python3}
 %package -n python3-ldns
 Summary: Python3 extensions for ldns
-Group: Applications/System
 Requires: %{name}%{?_isa} = %{version}-%{release}
 %{?python_provide:%python_provide python3-ldns}
 
@@ -133,7 +128,6 @@ Python3 extensions for ldns
 %if %{with perl}
 %package -n perl-ldns
 Summary: Perl extensions for ldns
-Group: Applications/System
 Requires: %{name}%{?_isa} = %{version}-%{release}
 Requires:  perl(:MODULE_COMPAT_%(eval "`%{__perl} -V:version`"; echo $version))
 
@@ -143,7 +137,6 @@ Perl extensions for ldns
 
 %package doc
 Summary: Documentation for the ldns library
-Group: Development/Libraries
 BuildArch: noarch
 
 %description doc