Remove an unused variable in PhabricatorDaemonLogViewController

Summary:
While poking a CSS bug in Diviner I was checking where else `PHUITagView::TYPE_STATE` is used.
Turns out that this use can be removed, as any reading of the $tag variable got removed in rP27e13ea0.

Test Plan: Search for `$tag` within that very file.

Reviewers: O1 Blessed Committers, mainframe98

Reviewed By: O1 Blessed Committers, mainframe98

Subscribers: tobiaswiese, valerio.bozzolan, Matthew, Cigaryno

Differential Revision: https://we.phorge.it/D26757

src/applications/daemon/controller/PhabricatorDaemonLogViewController.php

···
       ->setHeader($log->getDaemon())
       ->setHeaderIcon('fa-pied-piper-alt');
 
-    $tag = id(new PHUITagView())
-      ->setType(PHUITagView::TYPE_STATE);
-
     $status = $log->getStatus();
     switch ($status) {
       case PhabricatorDaemonLog::STATUS_UNKNOWN: