Add timer for subtasks and remove settings for subtask time tracking

app/Helper/Task.php

@@ -10,33 +10,6 @@ namespace Helper;
  */
 class Task extends \Core\Base
 {
-    /**
-     * Get the age of an item in quasi human readable format.
-     * It's in this format: <1h , NNh, NNd
-     *
-     * @access public
-     * @param  integer    $timestamp    Unix timestamp of the artifact for which age will be calculated
-     * @param  integer    $now          Compare with this timestamp (Default value is the current unix timestamp)
-     * @return string
-     */
-    public function age($timestamp, $now = null)
-    {
-        if ($now === null) {
-            $now = time();
-        }
-
-        $diff = $now - $timestamp;
-
-        if ($diff < 3600) {
-            return t('<1h');
-        }
-        else if ($diff < 86400) {
-            return t('%dh', $diff / 3600);
-        }
-
-        return t('%dd', ($now - $timestamp) / 86400);
-    }
-
     public function getColors()
     {
         return $this->color->getList();