Remove unused Cache class

Kabuki CMS uses a Cache class to cache objects using APCU, but Pics has never used it.

templates/MainTemplate.php

@@ -60,12 +60,8 @@ class MainTemplate extends Template
 
 		if (Registry::has('user') && Registry::get('user')->isAdmin())
 		{
-			if (class_exists('Cache'))
-				echo '
-				<span class="cache-info">Cache info: ', Cache::$hits, ' hits, ', Cache::$misses, ' misses, ', Cache::$puts, ' puts, ', Cache::$removals, ' removals</span>';
-
 			if (Registry::has('start'))
-				echo '<br>
+				echo '
 				<span class="creation-time">Page creation time: ', sprintf('%1.4f', microtime(true) - Registry::get('start')), ' seconds</span>';
 
 			if (Registry::has('db'))