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-Class.spec

@@ -7,7 +7,6 @@ Group:          Development/Libraries
 URL:            http://search.cpan.org/dist/Test-Class/
 Source0:        http://www.cpan.org/authors/id/E/ET/ETHER/Test-Class-%{version}.tar.gz
 Patch0:         perl-Test-Class-UTF8.patch
-BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(id -nu)
 BuildArch:      noarch
 # Build:
 BuildRequires:  perl-interpreter