The £75million forward will not face any retrospective action for the incident during United's 1-0 win.
The incident was not included in referee Neil Swarbrick's match report and, after reviewing video footage, an FA panel failed to come to a unanimous verdict, meaning the 24-year-old will not be charged.
Although still comfortably United's top scorer with 12 goals to his name in 20 appearances across all competitions to date, the Belgium global, a £75m ($100.3m) summer arrival from Everton, has now netted in only one of his last 10 appearances at club level - a late effort in the 4-1 comeback defeat of Newcastle United on 18 November.
"The way Romelu wins the corner for the goal, the way Romelu ends the game-making tackles in the left-back position - that is the mentality I want". And unfortunately not every player is the same.
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He said he mentioned in passing to Sessions that he was visiting Russian Federation and the then-senator had no reaction. Sessions also told the House committee that he did not recall an encounter with another campaign adviser, Carter Page.
Lukaku could get a three-match domestic ban for violent conduct, which would rule him out of the home derby against Manchester City on 10 December.
United next visit Watford, who are eighth on the league table after an impressive 3-0 win at Newcastle United on Saturday. "Didn't score, I don't care".