Remove javadoc comment about using the event to translate as it is not clear

Co-authored-by: chris <github@onechris.mozmail.com>

api/src/main/java/org/geysermc/geyser/api/event/java/ServerCustomPayloadEvent.java

@@ -31,7 +31,6 @@ import org.geysermc.geyser.api.event.connection.ConnectionEvent;
 
 /**
  * Called when the Java server sends a custom payload to Geyser.
- * An extension/addon can use this event to translate this.
  * This event is not called when a built-in supported custom payload
  * such as floodgate is received.
  */