fix remove redundant condition

Author: tomdu3

Sprint-3/2-practice-tdd/count.js

@@ -1,7 +1,4 @@
 function countChar(stringOfCharacters, findCharacter) {
-  if (!stringOfCharacters.includes(findCharacter)) {
-    return 0;
-  }
   return stringOfCharacters.split("").filter((char) => char === findCharacter)
     .length;
 }