Remove compile time linkage in favour of class index

Optimize build time when no change happened for the BauSystem

BauSystem/BauSystem_Main/src/de/steamwar/bausystem/config/BauServer.java

@@ -19,21 +19,18 @@
 
 package de.steamwar.bausystem.config;
 
-import de.steamwar.linkage.Linked;
 import de.steamwar.providers.BauServerInfo;
 import de.steamwar.sql.SteamwarUser;
 import lombok.Getter;
 
 import java.util.UUID;
 
-@Linked
 public class BauServer {
 
     @Getter
-    private static BauServer instance;
+    private static BauServer instance = new BauServer();
 
-    public BauServer() {
-        instance = this;
+    private BauServer() {
     }
 
     private Integer owner;