Bug 1281424 followup, remove spec link from reference file. r=dbaron

DONTBUILD
2017-01-14 18:25:12 +00:00 · 2017-01-14 18:25:12 +00:00 · 3742b82262
--- a/layout/reftests/w3c-css/submitted/writing-modes-3/text-orientation-upright-directionality-001-ref.html
+++ b/layout/reftests/w3c-css/submitted/writing-modes-3/text-orientation-upright-directionality-001-ref.html
@ -4,7 +4,6 @@
 <meta charset="utf-8">
 <title>CSS Reference: text-orientation:upright in sideways-* writing modes</title>
 <link rel="author" title="Jonathan Kew" href="mailto:jfkthame@gmail.com">
-<link rel="help" href="https://drafts.csswg.org/css-writing-modes-3/#text-orientation">
 </head>
 <body style="font: 24px sans-serif">
 <p>The two sideways-rl lines should be identical: