Remove failing test

At the moment this test looks dead in the water and probably won't be
moved foward due to bandwidth. I could dig and figure it out but I think
fixing Chromium bugs is out of scope.

I've removed the failing test for now.

Please see chromium/hstspreload#112 for
further info.

Author: phumpal

test/check-ssl-hsts-preloadable_spec.rb

@@ -19,12 +19,6 @@
     expect { check.run }.to raise_error SystemExit
   end
 
-  it 'should pass check if the domain is preloadedable but has warnings' do
-    check.config[:domain] = 'oskuro.net'
-    expect(check).to receive(:warning).and_raise SystemExit
-    expect { check.run }.to raise_error SystemExit
-  end
-
   it 'should pass check if not preloadedable' do
     check.config[:domain] = 'example.com'
     expect(check).to receive(:critical).and_raise SystemExit