Fix compilation error.

Remove `cfg(test)` attribute from `RoomMap::get_strict`.

client/src/room.rs

@@ -115,7 +115,6 @@ impl RoomMap {
 
   /// Looks up the given room name in the map, returning an immutable
   /// reference to the associated data if found, or an error if not found.
-  #[cfg(test)]
   pub fn get_strict(&self, room_name: &str) -> Result<&Room, RoomError> {
     match self.map.get(room_name) {
       Some(room) => Ok(room),