Disable extra information link

It is not really easy to check it locally since some
real repo setup is needed. So, hope for the best.

src/applications/transactions/view/PhabricatorApplicationTransactionView.php

@@ -274,6 +274,7 @@ class PhabricatorApplicationTransactionView extends AphrontView {
 
   private function buildExtraInformationLink(
     PhabricatorApplicationTransaction $xaction) {
+    return null;
 
     $link = $xaction->renderExtraInformationLink();
     if (!$link) {