Remove obsolete Group tag

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

c-ares.spec

@@ -3,7 +3,6 @@ Name: c-ares
 Version: 1.15.0
 Release: 1%{?dist}
 License: MIT
-Group: System Environment/Libraries
 URL: http://c-ares.haxx.se/
 Source0: http://c-ares.haxx.se/download/%{name}-%{version}.tar.gz
 # The license can be obtained at http://c-ares.haxx.se/license.html
@@ -22,7 +21,6 @@ by Greg Hudson at MIT.
 
 %package devel
 Summary: Development files for c-ares
-Group: Development/Libraries
 Requires: %{name} = %{version}-%{release}
 Requires: pkgconfig