Paleo diet, look it up.
Lean proteins, nuts, lots of veggies and some fruit. No grains, no dairy, no refined sugar, no processed food.
I've seen people in my gym lose mass weight from diet and zero "cardio".
Sorry if diet and strength did not work for you, but claiming that without doing cardio you will not lose weight is completely false. I would look at the diet you were doing before anything else.