Revert "adds deepMapKeys snippet"

This reverts commit 73470c50d9.

snippets/deepMapKeys.md

@@ -1,59 +0,0 @@
-### deepMapKeys
-
-Deep maps an object keys.
-
-Creates an object with the same values as the provided object and keys generated by running the provided function for each key.
-
-Use Object.keys(obj) to iterate over the object's keys. Use Array.prototype.reduce() to create a new object with the same values and mapped keys using fn.
-
-```js
-const deepMapKeys = (obj, f) => (
-  Array.isArray(obj)
-    ? obj.map(val => deepMapKeys(val, f))
-    : (typeof obj === 'object')
-    ? Object.keys(obj).reduce((acc, current) => {
-      const val = obj[current];
-      acc[f(current)] = (val !== null && typeof val === 'object')
-        ? deepMapKeys(val, f)
-        : acc[f(current)] = val;
-      return acc;
-    }, {})
-    : obj
-);
-```
-
-```js
-'use strict';
-const obj = {  
-   foo:'1',
-   isnull:null,
-   nested:{  
-      bar:'1',
-      child:{  
-         withArray:[  
-            {  
-               grandChild:[ 'hello' ]
-            }
-         ]
-      }
-   }
-}
-const upperKeysObj = deepMapKeys(obj, (key) => key.toUpperCase());
-/*
-Formatted JSON Data
-{  
-   "FOO":"1",
-   "ISNULL":null,
-   "NESTED":{  
-      "BAR":"1",
-      "CHILD":{  
-         "WITHARRAY":[  
-            {  
-               "GRANDCHILD":[ 'hello' ]
-            }
-         ]
-      }
-   }
-}
-*/
-```