There are two types of hinges, one type has a circlip holding the pin in, the other type is more like a rivetted end. The pins can be a pain to remove because of paint on the pin and because one end is knurled. I recommend unbolting the hines to get the pins removed. If you have the rivet type then replace them for the circlip type. Clean up the pins to remove all the paint and file down the knurling. The pins should then be relatively easy to push in and out and the doors can be easily removed.