Unlikely you'll find anyone to take this type of waste, clean topsoil is a different matter, ie no sods etc
According to your measurements you'll have approx 1.5 cu m, which isn't a lot except for wheelie bins. A mini skip will cost € 120.00, so a better alternative would be a baby skip bag (you get them at the local DIY/Builder stores. I think they cost € 50.00 +/-.
This way allows you to clear area and not get fussed with Raised Beds and handling bits of sod etc etc. Probably more grief than its worth to you.
If you were not in a hurry you could spray grass area and effectively kill everything. At least you'd have 'cleaner' soil for disposal or distribution.