Remove implode_selected_handle_links()

Summary: Ref T7689. Use the newer, less-janky stuff for rendering handles.

Test Plan:
- Viewed a revision hovercard; viewed "Author", viewed "Reviewers", viewed "Tasks".
- Viewed a task hovercard; viewed "Assigned To"; viewed "Projects"; viewed other edge fields.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T7689

Differential Revision: https://secure.phabricator.com/D12209

src/applications/phid/handle/view/render.php

@@ -1,17 +0,0 @@
-<?php
-
-/**
- * Implodes selected handles from a pool of handles. Useful if you load handles
- * for various phids, but only render a few of them at a time.
- *
- * @return PhutilSafeHTML
- */
-function implode_selected_handle_links($glue, array $handles, array $phids) {
-
-  $items = array();
-  foreach ($phids as $phid) {
-    $items[] = $handles[$phid]->renderLink();
-  }
-
-  return phutil_implode_html($glue, $items);
-}