cleanup

src/day3.rs

@@ -37,9 +37,6 @@ impl Rucksack {
         }
         panic!("Common item not found");
     }
-    fn contains(&self, item: &u8) -> bool {
-        self.compartments().into_iter().flatten().contains(item)
-    }
     fn common_with<'a>(&self, other: &[u8]) -> impl Iterator<Item = u8> {
         self.compartments()
             .into_iter()

src/day4.rs

@@ -1,4 +1,4 @@
-use std::{io::BufRead, ops::RangeInclusive};
+use std::ops::RangeInclusive;
 
 use aoc_runner_derive::{aoc, aoc_generator};