Remove obsolete Group tag

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

liboauth.spec

@@ -3,7 +3,6 @@ Version:        1.0.3
 Release:        11%{?dist}
 Summary:        OAuth library functions
 
-Group:          System Environment/Libraries
 License:        MIT
 URL:            http://liboauth.sourceforge.net/
 Source0:        http://downloads.sourceforge.net/%{name}/%{name}-%{version}.tar.gz
@@ -24,7 +23,6 @@ as well as perform HTTP requests.
 
 %package        devel
 Summary:        Development files for %{name}
-Group:          Development/Libraries
 Requires:       %{name} = %{version}-%{release}
 %if 0%{?el5}
 Requires:       pkgconfig curl-devel nss-devel