uuid changes

src/main/java/net/minecraft/server/WorldData.java

@@ -1,7 +1,6 @@
 package net.minecraft.server;
 
 import java.util.List;
-import org.bukkit.Bukkit;
 
 public class WorldData {
 
@@ -20,7 +19,6 @@ public class WorldData {
     private int m;
     private boolean n;
     private int o;
-    private long worldUID; // CraftBukkit
 
     public WorldData(NBTTagCompound nbttagcompound) {
         this.a = nbttagcompound.getLong("RandomSeed");
@@ -40,24 +38,11 @@ public class WorldData {
             this.h = nbttagcompound.k("Player");
             this.i = this.h.e("Dimension");
         }
-        // CraftBukkit start
-        if (nbttagcompound.hasKey("WorldUID")) {
-            this.worldUID = nbttagcompound.getLong("WorldUID");
-        } else {
-            this.worldUID = (System.nanoTime() << 20) + this.a;
-            nbttagcompound.setLong("WorldUID", this.worldUID);
-        }
-
-        if (Bukkit.getServer().getWorld(worldUID) != null) {
-            throw new IllegalStateException("World '" + name + "' contains a conflicting UID with existing world. Please edit its level.dat and remove WorldUID, or delete its level.dat (and lose its seed/etc).");
-        }
-        // CraftBukkit end
     }
 
     public WorldData(long i, String s) {
         this.a = i;
         this.name = s;
-        this.worldUID = (System.nanoTime() << 20) + this.a; // CraftBukkit
     }
 
     public WorldData(WorldData worlddata) {
@@ -120,7 +105,6 @@ public class WorldData {
         if (nbttagcompound1 != null) {
             nbttagcompound.a("Player", nbttagcompound1);
         }
-        nbttagcompound.setLong("WorldUID", this.worldUID); // CraftBukkit
     }
 
     public long getSeed() {
@@ -208,10 +192,4 @@ public class WorldData {
     public void setWeatherDuration(int i) {
         this.m = i;
     }
-
-    // CraftBukkit start
-    public long getWorldUID() {
-        return this.worldUID;
-    }
-    // CraftBukkit end
 }