Unused variable.

src/aoc2024/Day09.kt

@@ -48,14 +48,12 @@ fun main() {
     fun part2(input: List<String>): Long {
         var pos = 0
         var isFile = true
-        var fileId = 0
         val freeList = Array<MutableSet<Int>>(10) { TreeSet() }
         val fileList = ArrayList<Pair<Int, Int>>((input[0].length + 1) / 2)
         for (c in input[0]) {
             val size = c - '0'
             if (isFile) {
                 fileList.add(pos to size)
-                fileId++
             } else if (size > 0) {
                 freeList[size].add(pos)
             }