Remove duplicate thread initialization

core/src/main/java/me/filoghost/holographicdisplays/core/tracking/PacketSenderExecutor.java

@@ -13,37 +13,21 @@ import java.util.concurrent.LinkedBlockingQueue;
 /**
  * This is a quick but ugly helper class for creating and sending packets async.
  * Static classes like this should be avoided.
+ * Important note: this executor can only have one thread, as packets must be sent in a precise order.
  */
 public class PacketSenderExecutor {
 
     private static volatile BlockingQueue<Runnable> tasks;
-    private static volatile Thread thread;
 
     private static final Runnable STOP_MARKER_TASK = () -> {};
 
-    static {
-        tasks = new LinkedBlockingQueue<>();
-        thread = new Thread(() -> {
-            while (true) {
-                try {
-                    Runnable task = tasks.take();
-                    task.run();
-                } catch (Throwable t) {
-                    Log.severe("Error in packet sender task", t);
-                }
-            }
-        });
-        thread.setName("Holographic Displays async packets");
-        thread.start();
-    }
-
     public static void execute(Runnable task) {
         tasks.add(task);
     }
 
     public static void start() {
         tasks = new LinkedBlockingQueue<>();
-        thread = new Thread(() -> {
+        Thread thread = new Thread(() -> {
             while (true) {
                 try {
                     Runnable task = tasks.take();
@@ -56,7 +40,7 @@ public class PacketSenderExecutor {
                 }
             }
         });
-        thread.setName("Holographic Displays packet sender");
+        thread.setName("Holographic Displays async packets");
         thread.start();
     }