If you wantto delete a required field on the sell page, then you can use a hidden form field instead for it. The hidden form field name must be the same form field name that you want to delete and you must set its value to some digits or text depending on the field data expected.
For example, if you want to delete the location categories, you can remove it and insert the form hiddend filed instead like this:
Thanks Where do I put that?\
I've made an error I can't get out of. I've deleted some variables which have left blank boxes now in the sell form. What files do I have to upload to restore the sell form back to it's original form? I tried sell.pm as that is the file I edited but the errors are still there.\