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-Test-Distribution.spec

@@ -7,7 +7,6 @@ Group:		Development/Libraries
 URL:		http://search.cpan.org/dist/Test-Distribution/
 Source0:	http://search.cpan.org/CPAN/authors/id/S/SR/SRSHAH/Test-Distribution-%{version}.tar.gz
 Patch0:		Test-Distribution-2.00-utf8.patch
-BuildRoot:	%{_tmppath}/%{name}-%{version}-%{release}-root-%(id -nu)
 BuildArch:	noarch
 BuildRequires:	perl-generators
 BuildRequires:	perl(ExtUtils::Manifest)