Remove Scope::Upper recommends

Ref #1716

Thanks to @waghanza for noting that Scope::Upper is failing to buidl on
devel perl releases.  Thanks to @SysPete for confirming we should have
removed the recommends on Scope::Upper when Return::MultiLevel was
removed.

cpanfile

@@ -65,7 +65,6 @@ recommends 'Math::Random::ISAAC::XS';
 recommends 'MooX::TypeTiny';
 recommends 'Pod::Simple::Search';
 recommends 'Pod::Simple::SimpleTree';
-recommends 'Scope::Upper';
 recommends 'Type::Tiny::XS';
 recommends 'URL::Encode::XS';
 recommends 'YAML::XS';