I want to cut a player out of our DND sessions.
Why do you want him out of your sessions?
He's lazy and doesn't really try to roleplay with us.
Wanting to have the best DND experience you can get is completely understandable and that guy seems to be pulling down the group vibe. Removing him would likely be a good idea but make sure you talk to the entire group including him before you make that choice.
I'm going to ask the group what they think.
Yup, that's a good idea. I hope you have better fun later.