If someone sealed off a door in their home when doing construction, in a way that the door can no longer be used, can the mezuzah that is there now be taken down since the down since the door is no longer in use? .
(Although there is a different point over here in regards to what it says in the Tzvah of Rebbe Yehuda HaChossid we'll put that point aside -- perhaps they made a hole in the door, etc.)
This seems simple and I'm sure it can be taken down. However, I'm wondering if there is anyone that says not like this. Or in general any achronim/poskim/seforim that discuss this situation.