Fix hint wording in tutorial.md (#9867)

The tutorial hints that a change can be made that allows you to go back
in time then click in the board to create a new entry, but the change is
already present in the example code.

This fix removes the hint and re-words the explanation of the change the
example code is making.

tutorial/tutorial.md

@@ -1038,7 +1038,7 @@ Add a method called `jumpTo` to the Game class:
   }
 ```
 
-Then update `stepNumber` when a new move is made by adding `stepNumber: history.length` to the state update in Game's `handleClick`:
+Then update `stepNumber` when a new move is made by adding `stepNumber: history.length` to the state update in Game's `handleClick`. We'll also update `handleClick` to be aware of `stepNumber` when reading the current board state so that you can go back in time then click in the board to create a new entry.:
 
 ```javascript{2,13}
   handleClick(i) {
@@ -1074,8 +1074,6 @@ Now you can modify Game's `render` to read from that step in the history:
 
 If you click any move link now, the board should immediately update to show what the game looked like at that time.
 
-You may also want to update `handleClick` to be aware of `stepNumber` when reading the current board state so that you can go back in time then click in the board to create a new entry. (Hint: It's easiest to `.slice()` off the extra elements from `history` at the very top of `handleClick`.)
-
 ### Wrapping Up
 
 Now, you've made a tic-tac-toe game that: