so im not running a speedometer could i just cut those two wires out completly??
Brown and white is instrument lighting, but I believe it also powers your front running lights (L and R filament 1) through the switch. It's a complicated switch because it turns the running light off while also turning on the flashing second filament. In theory, especially if you go with LED lighting (do avoid overloading the circuit), you could get away with wiring the running lights straight to instrument power. It'll make the flasher less noticeable on the front though.
Best solution if you want to pare down the switch to something basic would be to wire up relays somehow to give you the same functionality as the original switch. Cheap and easy way would be to just not have running lights on the front, but then there's probably some legality issues in some jurisdictions.