As Hockey Patrol pointed out, the 5 PM deadline passed without a word from the NHL. Hence, it is pretty well guaranteed that there will be no supplemental discipline.
For Habs fans, this is certainly not a great decision. However, the league typically doesn't punish knee-on-knee hits, especially when it is the preseason and a first-time offender is involved. Xhekaj was able to secure justice and for many, that is going to be enough.