fix cargo warnings.

src/template/part1.rs

@@ -1,3 +1,4 @@
+#![allow(unused)]
 use crate::utilities::*;
 
 pub fn part1() -> usize {

src/template/part2.rs

@@ -1,3 +1,4 @@
+#![allow(unused)]
 use crate::utilities::*;
 
 pub fn part2() -> usize {

src/template/solve.rs

@@ -1,10 +1,11 @@
+#![allow(unused)]
 mod part1;
 mod part2;
 mod utilities;
 
 fn main() {
-    let _input = include_str!("./input.txt");
-    let _structured_input = utilities::parse(_input);
+    let input = include_str!("./input.txt");
+    let structured_input = utilities::parse(input);
 
     println!("Part One");
     println!("Result: {}", part1::part1());

src/template/utilities.rs

@@ -1,3 +1,4 @@
+#![allow(unused)]
 pub fn parse(input: &str) -> usize {
     unimplemented!()
 }