finishes decoupling map from camera

src/map_builders/common.rs

@@ -1,6 +1,7 @@
 use super::{Map, Rect, TileType};
 use std::cmp::{max, min};
 
+#[allow(dead_code)]
 pub fn apply_room_to_map(map: &mut Map, room: &Rect) {
     for y in room.y1 + 1..=room.y2 {
         for x in room.x1 + 1..=room.x2 {