So I have an older 80s Schwinn road bike and I would like to remove the whole handlebar setup, not just the handlebars themselves. Ive tried to look at a couple videos online and all they show is a guy taking an alan wrench and removing one long bolt, and viola presto, handlebar slides out easy... seems not to be the case on these older road bikes?

Edit : after i remove the bolt, should I just whack the **** out of it with a rubber mallet, or am I suppose to unscrew that 1.2inch large nut looking thing at the top?