Doc: Remove index/toc view script

I see no reference to this file.

refs #4820

modules/doc/application/views/scripts/index/toc.phtml

@@ -1,14 +0,0 @@
-<div class="controls">
-<h1>Module documentations</h1>
-</div>
-<div class="content" data-base-target="_next">
-<?= $this->partial(
-    'layout/menu.phtml',
-    'default',
-    array(
-        'items' => $toc->getChildren(),
-        'sub'   => false,
-        'url'   => ''
-    )
-) ?>
-</div>