How to remove front struts

I think you are referring to the OEM captive head that comes on them normally. Item 5 in the image? On those you just run the nut off and the tab holds them. If the tab has come off it gets harder as there isn't a lot to grab. Most of the time they will be rusted in the bushing and the nut will come off and then you beat the bolt out. Another option is to grab a piece of flat steel, drill a hole that is close to the head size and drive it on like the original tab, then tack it in place. The option that also works is to grab a grinder and grind a couple flats that you can put some vice grips or a wrench on, or just grind the entire head off and drive it out from the "wrong" end.