If you cant swallow enough nutrition for your daily needs,then you are not ready to have the peg taken out.
On the other hand if you are not trying to eat because you know you have the PEG thats a different kettle of fish.
Try going for a whole day without using it,and see what happens.Then try two days and then three.How you get on should answer your own question,and help make the decision easier.
Its just like walking on a broken limb without your crutches or a cane for the first time,until you know you are not going to fall over you cant throw them away.So take baby steps till you are up and running.
love liz