No, clutch switch has to be present. You can track down harness connector for left-hand controls and jumper wires that clutch-lever is released. Then you'd have to make sure you're in neutral when starting.
Lots of people jumper clutch switch to be squeezed all the time. But ECU uses tamer ignition settings when it sees clutch squeezed. Assumes you don't need a whole lot of power when stationary.