Removed pubNumber for valid OM example

Author: fschleich

test/resources/html/validation/om-valid.html

@@ -7,7 +7,6 @@
     <script src="../../../../smpte.js"></script>
     <meta itemprop="test" content="valid" />
     <meta itemprop="pubType" content="OM" />
-    <meta itemprop="pubNumber" content="5" />
     <meta itemprop="pubState" content="draft" />
     <meta itemprop="effectiveDateTime" content="2015-04-04" />
     <title>OM</title>