fix delete node undo bug.

Author: jchanvfx

NodeGraphQt/base/commands.py

@@ -153,8 +153,6 @@ def undo(self):
             [port.connect_to(p) for p in connected_ports]
 
     def redo(self):
-        self.graph.properties_bin().remove_node(self.node)
-
         for port, connected_ports in self.inputs:
             [port.disconnect_from(p) for p in connected_ports]
         for port, connected_ports in self.outputs: