fix(challange): Redundant note has been removed (#16895)

challenges/02-javascript-algorithms-and-data-structures/es6.json

@@ -40,8 +40,7 @@
         "Note the <code>\"use strict\"</code>. This enables Strict Mode, which catches common coding mistakes and \"unsafe\" actions. For instance:",
         "<blockquote>\"use strict\";<br>x = 3.14; // throws an error because x is not declared</blockquote>",
         "<hr>",
-        "Update the code so it only uses the <code>let</code> keyword.",
-        "<strong>Note</strong><br>Remember that since <code>let</code> prevents variables from being overridden, you will need to remove one of the declarations entirely."
+        "Update the code so it only uses the <code>let</code> keyword."
       ],
       "challengeSeed": [
         "var catName;",
@@ -710,7 +709,6 @@
         "Refactor the function <code>setGear</code> inside the object <code>bicycle</code> to use the shorthand syntax described above."
       ],
       "challengeSeed": [
-
         "// change code below this line",
         "const bicycle = {",
         "  gear: 2,",