Update pull.md

variable i isn't being used

snippets/pull.md

@@ -11,7 +11,7 @@ Use `Array.prototype.length = 0` to mutate the passed in an array by resetting i
 ```js
 const pull = (arr, ...args) => {
   let argState = Array.isArray(args[0]) ? args[0] : args;
-  let pulled = arr.filter((v, i) => !argState.includes(v));
+  let pulled = arr.filter(v => !argState.includes(v));
   arr.length = 0;
   pulled.forEach(v => arr.push(v));
 };