The term 'unskilled' doesn't usually imply non-academically qualified. It means 'not having or needing skill or special training' (Concise Oxford). Normally it is applied to laboring jobs as opposed to those which require an apprenticeship, trade course or other specific learning and skills training (including, but not limited to, academic qualifications). Examples of unskilled labor would be things like fruit-picking, working on a road gang, garbage collector (that's trashman to you Americans or dustman to you Brits), factory production line worker, or any other job that requires little or no training and can be commenced immediately. Examples of labor that are skilled yet non-academic would include fork-lift driver, crane chaser, bricklayer, jackaroo (cowboy), farmer.