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>

perl-Algorithm-C3.spec

@@ -6,7 +6,6 @@ License:	GPL+ or Artistic
 Group:		Development/Libraries
 URL:		http://search.cpan.org/dist/Algorithm-C3/
 Source0:	http://search.cpan.org/CPAN/authors/id/H/HA/HAARG/Algorithm-C3-%{version}.tar.gz
-BuildRoot:	%{_tmppath}/%{name}-%{version}-%{release}-root-%(id -nu)
 BuildArch:	noarch
 # Build
 BuildRequires:	perl-interpreter