diff --git a/snippets_archive/cleanObj.md b/snippets_archive/cleanObj.md
deleted file mode 100644
index 40956a51a..000000000
--- a/snippets_archive/cleanObj.md
+++ /dev/null
@@ -1,27 +0,0 @@
----
-title: cleanObj
-tags: object,beginner
----
-
-Removes any properties except the ones specified from a JSON object.
-
-Use `Object.keys()` method to loop over given JSON object and deleting keys that are not included in given array.
-If you pass a special key,`childIndicator`, it will search deeply apply the function to inner objects, too.
-
-```js
-const cleanObj = (obj, keysToKeep = [], childIndicator) => {
-  Object.keys(obj).forEach(key => {
-    if (key === childIndicator) {
-      cleanObj(obj[key], keysToKeep, childIndicator);
-    } else if (!keysToKeep.includes(key)) {
-      delete obj[key];
-    }
-  });
-  return obj;
-};
-```
-
-```js
-const testObj = { a: 1, b: 2, children: { a: 1, b: 2 } };
-cleanObj(testObj, ['a'], 'children'); // { a: 1, children : { a: 1}}
-```
\ No newline at end of file
diff --git a/test/cleanObj.test.js b/test/cleanObj.test.js
deleted file mode 100644
index 4cc144c5a..000000000
--- a/test/cleanObj.test.js
+++ /dev/null
@@ -1,9 +0,0 @@
-const {cleanObj} = require('./_30s.js');
-
-test('cleanObj is a Function', () => {
-  expect(cleanObj).toBeInstanceOf(Function);
-});
-const testObj = { a: 1, b: 2, children: { a: 1, b: 2 } };
-test('Removes any properties except the ones specified from a JSON object', () => {
-  expect(cleanObj(testObj, ['a'], 'children')).toEqual({ a: 1, children: { a: 1 } });
-});