Fix NPE in ComponentHolder

proxy/src/main/java/com/velocitypowered/proxy/connection/client/ConnectedPlayer.java

@@ -543,7 +543,7 @@ public class ConnectedPlayer implements MinecraftConnectionAssociation, Player,
   public void clearPlayerListHeaderAndFooter() {
     clearPlayerListHeaderAndFooterSilent();
     if (this.getProtocolVersion().compareTo(ProtocolVersion.MINECRAFT_1_8) >= 0) {
-      this.connection.write(HeaderAndFooter.reset());
+      this.connection.write(HeaderAndFooter.reset(this.getProtocolVersion()));
     }
   }
 

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/HeaderAndFooter.java

@@ -28,13 +28,11 @@ import net.kyori.adventure.text.Component;
 
 public class HeaderAndFooter implements MinecraftPacket {
 
-  private static final HeaderAndFooter RESET = new HeaderAndFooter();
-
   private final ComponentHolder header;
   private final ComponentHolder footer;
 
   public HeaderAndFooter() {
-    this(ComponentHolder.EMPTY, ComponentHolder.EMPTY);
+    throw new UnsupportedOperationException("Decode is not implemented");
   }
 
   public HeaderAndFooter(ComponentHolder header, ComponentHolder footer) {
@@ -72,7 +70,8 @@ public class HeaderAndFooter implements MinecraftPacket {
       new ComponentHolder(protocolVersion, footer));
   }
 
-  public static HeaderAndFooter reset() {
-    return RESET;
+  public static HeaderAndFooter reset(ProtocolVersion version) {
+    ComponentHolder empty = new ComponentHolder(version, Component.empty());
+    return new HeaderAndFooter(empty, empty);
   }
 }

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/chat/ComponentHolder.java

@@ -52,14 +52,8 @@ import java.util.List;
 import java.util.Map;
 
 public class ComponentHolder {
-  public static ComponentHolder EMPTY = new ComponentHolder(null, Component.empty());
   private static final Logger logger = LogManager.getLogger(ComponentHolder.class);
 
-  static {
-    EMPTY.json = "{\"text\":\"\"}";
-    EMPTY.binaryTag = StringBinaryTag.stringBinaryTag("");
-  }
-
   private final ProtocolVersion version;
   private @MonotonicNonNull Component component;
   private @MonotonicNonNull String json;