Drop obsolete Group tag

The packaging guidelines specify that this tag should not be used.

znc.spec

@@ -15,7 +15,6 @@ Name:           znc
 Version:        1.7.1
 Release:        2%{?dist}
 Summary:        An advanced IRC bouncer
-Group:          System Environment/Daemons
 
 License:        ASL 2.0
 URL:            https://znc.in
@@ -48,7 +47,6 @@ DCC bouncing, Perl and C++ module support to name a few.
 
 %package devel
 Summary:        Development files needed to compile ZNC modules
-Group:          Development/Libraries
 Requires:       %{name} = %{version}-%{release} pkgconfig
 Requires:       openssl-devel c-ares-devel glibc-devel libicu-devel%{?_isa}
 BuildRequires: pkgconfig
@@ -60,7 +58,6 @@ modules.
 
 %package modtcl
 Summary:       TCL module for ZNC
-Group:         Development/Libraries
 
 BuildRequires: tcl-devel
 
@@ -73,7 +70,6 @@ Requires:      tcl
 %if 0%{?with_modperl}
 %package modperl
 Summary:       Perl module for ZNC
-Group:         Development/Libraries
 
 BuildRequires: perl-devel
 BuildRequires: perl-generators
@@ -92,7 +88,6 @@ Provides:      perl(ZNC::Module) = %{version}-%{release}
 %if 0%{?with_modpython}
 %package modpython
 Summary:       Python3 module for ZNC
-Group:         Development/Libraries
 
 %if 0%{?rhel}
 BuildRequires: python34-devel
@@ -223,6 +218,7 @@ getent passwd znc >/dev/null || \
 - Simplify %%{_libdir}/znc/ file list
 - Enable verbose make
 - Pass --with-tcl to ensure tclConfig.sh is found
+- Remove Group tag
 
 * Mon Jul 23 2018 Nick Bebout <nb@fedoraproject.org> - 1.7.1-2
 - Add gcc-c++ and redhat-rpm-config to znc-devel's dependencies