#1305: Don't allow Player removal via Entity#remove

By: DerFrZocker <derrieple@gmail.com>

paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java

@@ -206,6 +206,12 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         return getHandle().getGameProfile();
     }
 
+    @Override
+    public void remove() {
+        // Will lead to an inconsistent player state if we remove the player as any other entity.
+        throw new UnsupportedOperationException(String.format("Cannot remove player %s, use Player#kickPlayer(String) instead.", getName()));
+    }
+
     @Override
     public boolean isOp() {
         return server.getHandle().isOp(getProfile());