Remove obsolete Group tag

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

xcb-util-cursor.spec

@@ -2,7 +2,6 @@ Name:		xcb-util-cursor
 Version:	0.1.3
 Release:	7%{?dist}
 Summary:	Cursor library on top of libxcb
-Group:		System Environment/Libraries
 License:	MIT
 URL:		http://xcb.freedesktop.org
 Source0:	http://xcb.freedesktop.org/dist/%{name}-%{version}.tar.bz2
@@ -21,7 +20,6 @@ XCB util-cursor module provides the following libraries:
 
 %package 	devel
 Summary:	Development and header files for xcb-util-cursos
-Group:		System Environment/Libraries
 Requires:	%{name}%{?_isa} = %{version}-%{release}
 
 %description	devel