Revert "Report fail in html_config when fail happens. I believe this was why we were"

this failed for empty test suites (mainly in individual configuration when tests
are suppressed when features are not supported)

Review URL: https://codereview.chromium.org//207493003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/unittest@34221 260f80e4-7a28-3924-810f-c04153c831b5