fix(curriculum): removed solution required comment from 6 challenges (#38339)

* fix: removed solution required comments

* fix: fixed two more challenge soltuions with solution required comment

* fix: remove debugging code

Co-Authored-By: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/use-the-value-attribute-with-radio-buttons-and-checkboxes.english.md

@@ -96,7 +96,6 @@ tests:
 <section id='solution'>
 
 ```html
-// solution required
 <h2>CatPhotoApp</h2>
 <main>
   <p>Click here to view more <a href="#">cat photos</a>.</p>

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/access-an-arrays-contents-using-bracket-notation.english.md

@@ -79,7 +79,6 @@ console.log(myArray);
 <section id='solution'>
 
 ```js
-// solution required
 let myArray = ["a", "b", "c", "d"];
 myArray[1] = "e";
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/access-property-names-with-bracket-notation.english.md

@@ -76,7 +76,6 @@ console.log(checkInventory("apples"));
 <section id='solution'>
 
 ```js
-// solution required
 let foods = {
   apples: 25,
   oranges: 32,

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/combine-arrays-with-the-spread-operator.english.md

@@ -63,8 +63,6 @@ console.log(spreadOut());
 <section id='solution'>
 
 ```js
-// solution required
-
 function spreadOut() {
   let fragment = ['to', 'code'];
   let sentence = ['learning', ...fragment, 'is', 'fun'];

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/use-the-delete-keyword-to-remove-object-properties.english.md

@@ -68,7 +68,6 @@ console.log(foods);
 <section id='solution'>
 
 ```js
-// solution required
 let foods = {
   apples: 25,
   oranges: 32,

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/learn-about-functional-programming.english.md

@@ -74,7 +74,6 @@ const tea4TeamFCC = null;
 <section id='solution'>
 
 ```js
-// solution required
 const prepareTea = () => 'greenTea';
 
 const getTea = (numOfCups) => {

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/understand-functional-programming-terminology.english.md

@@ -88,7 +88,6 @@ console.log(
 <section id='solution'>
 
 ```js
-// solution required
 const prepareGreenTea = () => 'greenTea';
 const prepareBlackTea = () => 'blackTea';
 

curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/get-json-with-the-javascript-xmlhttprequest-method.english.md

@@ -122,7 +122,6 @@ tests:
 <section id='solution'>
 
 ```html
-// solution required
 <script>
   document.addEventListener('DOMContentLoaded',function(){
     document.getElementById('getMessage').onclick = function(){