It’s not like English needs the letter X anyway. Anything with an X in it could be spelled with some other letter or letters, usually ‘ks’ or ‘z’.
Of course, it’s possible to go too far in trying to simplify English spelling. It’s pretty much impossible not to, in fact, which is why no one since Noah Webster has really succeeded. (You have him to thank—or curse—for most of the differences between American and British spelling.)