Remove BuildRoot definition

None of currently supported distributions need that.
It was needed last for EL5 which is EOL now

Signed-off-by: Igor Gnatenko <ignatenkobrain@fedoraproject.org>

ocserv.spec

@@ -45,7 +45,6 @@ Source11:	ocserv.init
 
 # Taken from upstream:
 # http://git.infradead.org/ocserv.git/commitdiff/7d70006a2dbddf783213f1856374bacc74217e09
-BuildRoot:	%{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 
 %if 0%{?rhel} && 0%{?rhel} <= 6
 BuildRequires:	gnutls30-devel