Remove unused

aoc/src/main/scala/aoc/package.scala

@@ -30,12 +30,4 @@ package object aoc {
     go(as, Set.empty)
   }
 
-  def levenshtein(a: String, b: String): Int =
-    ((0 to b.length).toList /: a)(
-      (prev, x) =>
-        (prev zip prev.tail zip b).scanLeft(prev.head + 1) {
-          case (h, ((d, v), y)) => Math.min(Math.min(h + 1, v + 1), d + (if (x == y) 0 else 1))
-      }
-    ).last
-
 }