I would leave the safety measures 'as is'. Reason being, if you remove baby gates, for example, you are either going to have to patch the holes or explain them, and neither option sounds like a good one to me. Not to mention all would have to be put right back up once the open was over.
Safety equipment can also help you as well with couples that currently have a baby on the way or toddler. The couple doesn't have to wonder if the house can be 'baby-proofed', they already know it can be, not to mention, the gates (etc.) could potentially be worked into the deal and save the new owners the hassle and expense.
Just my two cents!