Revert example implementation

Author: hsz

src/main/kotlin/com/github/kotlinhandson/aoc/Day01.kt

@@ -1,11 +1,9 @@
 package com.github.kotlinhandson.aoc
 
-import com.github.kotlinhandson.aoc.utils.ints
-
 class Day01 : Day(1) {
 
     override fun part1(input: String): Int {
-        return input.ints().sum()
+        return 0
     }
 
     override fun part2(input: String): Int {