create PlayerManager static class

src/engine/workthreads/HalfHourlyJobThread.java

@@ -15,19 +15,12 @@ import engine.db.archive.DataWarehouse;
 import engine.db.archive.MineRecord;
 import engine.gameManager.*;
 import engine.net.DispatchMessage;
-import engine.net.MessageDispatcher;
 import engine.net.client.msg.chat.ChatSystemMsg;
 import engine.objects.*;
-import engine.server.world.WorldServer;
 import org.pmw.tinylog.Logger;
 
 import java.time.LocalDateTime;
 import java.util.ArrayList;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.ThreadLocalRandom;
-
-import static engine.gameManager.StrongholdManager.EndStronghold;
-import static engine.server.MBServerStatics.MINE_LATE_WINDOW;
 
 public class HalfHourlyJobThread implements Runnable {
 
@@ -155,7 +148,7 @@ public class HalfHourlyJobThread implements Runnable {
         mine.setActive(false);
         mine.wasClaimed = true;
         for(Integer id : mine._playerMemory){
-            PlayerCharacter pc = PlayerCharacter.getFromCache(id);
+            PlayerCharacter pc = PlayerManager.getFromCache(id);
             if(pc != null)
                 pc.ZergMultiplier = 1.0f;
         }