do not add rev to page output

It's not needed for the inline editor, but messes with the
renderrevisions plugin.

cosmocode/dokuwiki-plugin-renderrevisions#8
cosmocode/dokuwiki-plugin-renderrevisions#9

Author: splitbrain

syntax/output.php

@@ -189,7 +189,6 @@ public function renderSchemaData($rendercontext)
                 // add data attributes to the row for inline editing
                 $renderer->doc = substr(trim($renderer->doc), 0, -1); // remove the last >
                 $renderer->doc .= ' data-pid="' . hsc($schemadata->getPid()) . '"';
-                $renderer->doc .= ' data-rev="' . hsc($schemadata->getTimestamp()) . '"';
                 $renderer->doc .= ' data-rid="' . hsc($schemadata->getRid()) . '"';
                 $renderer->doc .= ' data-field="' . hsc($field->getColumn()->getFullQualifiedLabel()) . '"';
                 $renderer->doc .= '">';