#941: Don't allow Player removal via Entity#remove

By: DerFrZocker <derrieple@gmail.com>

paper-api/src/main/java/org/bukkit/entity/Entity.java

@@ -257,6 +257,8 @@ public interface Entity extends Metadatable, CommandSender, Nameable, Persistent
 
     /**
      * Mark the entity's removal.
+     *
+     * @throws UnsupportedOperationException if you try to remove a {@link Player} use {@link Player#kickPlayer(String)} in this case instead
      */
     public void remove();