Revert "[FormData] 번역 - line69(#1232)"

This reverts commit d2f140b.

Author: Violet-Bora-Lee

5-network/02-formdata/article.md

@@ -66,7 +66,7 @@ There's also method `set`, with the same syntax as `append`. The difference is t
 - `formData.set(name, value)`,
 - `formData.set(name, blob, fileName)`.
 
-Âü°í·Î Æû µ¥ÀÌÅÍ Çʵ忡 ¹Ýº¹ ÀÛ¾÷À» ÇÒ¶© `for..of` ·çÇÁ¸¦ »ç¿ëÇÒ ¼ö ÀÖ½À´Ï´Ù.
+Also we can iterate over formData fields using `for..of` loop:
 
 ```js run
 let formData = new FormData();