'finalize()' should not be overridden

this is fine to do because ZeroTierOneService calls close() when it is done

java/src/com/zerotier/sdk/Node.java

@@ -125,11 +125,6 @@ public class Node {
         node_delete(nodeId);
     }
 
-    @Override
-    protected void finalize() {
-        close();
-    }
-
     @Override
     public String toString() {
         return "Node(" + nodeId + ")";