Revert "Optimize scheduler"

This reverts commit 2b944e7af1.

src/main/java/org/bukkit/craftbukkit/CraftServer.java

@@ -174,7 +174,7 @@ public final class CraftServer implements Server {
     private final String bukkitVersion = Versioning.getBukkitVersion();
     private final Logger logger = Logger.getLogger("Minecraft");
     private final ServicesManager servicesManager = new SimpleServicesManager();
-    private final CraftScheduler scheduler = new org.bukkit.craftbukkit.scheduler.CraftSyncScheduler(); // Akarin
+    private final CraftScheduler scheduler = new CraftScheduler();
     private final CraftCommandMap commandMap = new CraftCommandMap(this);
     private final SimpleHelpMap helpMap = new SimpleHelpMap(this);
     private final StandardMessenger messenger = new StandardMessenger();