You can use two methods to remove unwired inputs from the Input Node. The first method you can use is resizing the node. Click and drag the resize handle at the bottom of the node up to remove unwired inputs from the node.
The second method you can use is removing individual unwired inputs. To remove the last unwired input on the Input Node, right-click the node and select Remove Input from the shortcut menu.
You also can rearrange the order of unwired inputs on the Input Node. Right-click an input and select Select Input from the shortcut menu to view a list of inputs. The top half of this list contains the inputs currently displayed on the Input Node. The input on which you right-clicked has a checkmark by it. Select an input from the top half of the list to switch the positions of the inputs. The bottom half of this list contains the inputs not currently displayed on the Input Node. Select an input from the bottom half of the list to replace the selected input with the input you select.