Neither Article V, nor any other article, says a state cannot be expelled by the other states. Try this, if it makes it easier for you. Don't think of it as one state being expelled by the other states. Think of it as every other state seceding from that one.
Bwahahahahahaha! What a galoot! The Constitution EXPRESSLY ['that no State, without its Consent, shall be deprived of its equal Suffrage in the Senate'] prohibits a state from being kicked out.