Reduced console spam under certain conditions.

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

@@ -46,7 +46,8 @@ class PlayerInstance {
 
     public void b(EntityPlayer entityplayer) {
         if (!this.b.contains(entityplayer)) {
-            (new IllegalStateException("Failed to remove player. " + entityplayer + " isn\'t in chunk " + this.chunkX + ", " + this.chunkZ)).printStackTrace();
+            // CraftBukkit - reduce console spam under certain conditions
+            //(new IllegalStateException("Failed to remove player. " + entityplayer + " isn\'t in chunk " + this.chunkX + ", " + this.chunkZ)).printStackTrace();
         } else {
             this.b.remove(entityplayer);
             if (this.b.size() == 0) {