Unknown vacuum line

I wonder if there is a purpose for this hose that has nothing to do with how the car was made... We've all had problems that we solved with some ingenuity. I think that I would at least leave it in place until you can find out where it goes on the inside. I'll make a wild guess - behind and above that sheet metal is the tray that is below the louvers between the windshield and the hood. Sometimes they get plugged with debris and may even rot out and leak into the car on the inside. If a former owner made a fix, they might have put a drain in to keep water from collecting and this is the drain end of that hose. Like I said, wild guess...