typo fix

remove redundant words

Author: greinerk

problems/anagram-detection/Readme.md

@@ -1,6 +1,6 @@
 # Anagram Detection
 
-Write a function that accepts two parameters, a parent and a child string. Determine how many times the child string - or an anagram of the of the child string - appears in the parent string. There is a solution which can be done in near instant time.
+Write a function that accepts two parameters, a parent and a child string. Determine how many times the child string - or an anagram of the child string - appears in the parent string. There is a solution which can be done in near instant time.
 
 ```js
 f('AdnBndAndBdaBn', 'dAn') // 4 ("Adn", "ndA", "dAn", "And")