Removes useless service registration

Signed-off-by: Michael Weimann <mail@michael-weimann.eu>

lib/private/Server.php

@@ -273,10 +273,6 @@ public function __construct($webRoot, \OC\Config $config) {
 		});
 		$this->registerAlias('SystemTagManager', \OCP\SystemTag\ISystemTagManager::class);
 
-		$this->registerService(MemoryInfo::class, function() {
-			return new MemoryInfo();
-		});
-
 		$this->registerService(\OCP\SystemTag\ISystemTagObjectMapper::class, function (Server $c) {
 			return $c->query('SystemTagManagerFactory')->getObjectMapper();
 		});