dillon1000/react

Clarity on constructor of Board object for tutorial.md (#8224)

* Update tutorial.md

Is it possible to be more clear here?
 This implies that we are removing the constructor from GAME, and not board (which is what I believe the author is trying to say).
It took me several reads to understand. 

With this edit, it is now clear that the adjustment is being made to -Board- and not to -Game-

* also remove "for Board earlier"