You do not necessarily have to take the bottle away at night, but you definitely CANNOT allow him to fall asleep with it! All the milk in the mouth while he sleeps has so much sugar, it can actually cause decay in his teeth before they even come up! And most likely, the teeth that he may currently have are not in such good shape, and may even be decaying already - so you need to stop giving him that bottle in his crib.
When my daughter was one and eating mostly solid foods (with some milk in bottles still) I made sure to give her a BIG dinner of solid food an hour or two before bed so that she was good and full for a long period of time. Then, go ahead and offer him a bottle right before bed, with you feeding it to him in your arms - he will be nice and full, and will generally start waking up less and less at night, as his dinner and bottle are quite enough to carry him totally through the night. If he DOES wake up at night for a bottle, and you know he ate a good dinner and drank his milk before bed, offer him a bottle with water in it - you CAN give that to him in his crib, or hold him and give it to him. He may take it or not, but either way, the bottle will become less desirable and he will give it up more easily.