
You can remove the selected or unselected nodes; or, the upstream or downstream nodes of a selected node using the marking menus or hotkeys.
In addition, you can also select nodes in the Node Editor and click the  button in the toolbar to remove it from the Node Editor graph.
 button in the toolbar to remove it from the Node Editor graph. 
         
Remove nodes using the node marking menus
 a node to access the node marking menu and select Remove Stream Nodes.
 a node to access the node marking menu and select Remove Stream Nodes. 
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             Except where otherwise noted, this work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
 Except where otherwise noted, this work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License