@JSSR that just sounds like it's going to fail, if you removed the cones and are running the wheel without them(or the locking nuts or any other parts of them) then the bearings will break almost instantly and then it will grind and the axel will snap after not very long which on a front wheel will send the wheel slamming to one side hitting the brake or fork and sending you sailing over the bars. The cones aren't spacers they are smooth surfaces for the bearings to sit on and the nuts after them hold the cones inplace to not damage the bearings or cones with under/over tightening.
@JSSR that just sounds like it's going to fail, if you removed the cones and are running the wheel without them(or the locking nuts or any other parts of them) then the bearings will break almost instantly and then it will grind and the axel will snap after not very long which on a front wheel will send the wheel slamming to one side hitting the brake or fork and sending you sailing over the bars. The cones aren't spacers they are smooth surfaces for the bearings to sit on and the nuts after them hold the cones inplace to not damage the bearings or cones with under/over tightening.