clean up 81

src/euler81/src/main.rs

@@ -137,25 +137,6 @@ struct Node {
     previous: Option<Coordinate>,
 }
 
-impl Node {
-    fn smaller_distance(&self, other: &Self) -> Option<std::cmp::Ordering> {
-        match self.distance {
-            Some(v1) => match other.distance {
-                Some(v2) => v1.partial_cmp(&v2),
-                None => Some(std::cmp::Ordering::Less),
-            },
-            None => match other.distance {
-                Some(_) => Some(std::cmp::Ordering::Greater),
-                None => None,
-            },
-        }
-    }
-
-    // fn smaller_value(&self, other: &Self) -> Option<std::cmp::Ordering> {
-    //     self.value.partial_cmp(&other.value)
-    // }
-}
-
 impl From<u32> for Node {
     fn from(value: u32) -> Self {
         Node {