Via the NBA's official Twitter:
RT:@NBAPR: NBA has rescinded OKC’s R. Westbrook’s technical assessed on April 12 at 5:57 of 4th qtr.— NBA Official (@NBAOfficial) April 13, 2015
Looks like the language wasn't considered nasty enough for Russell Westbrook to incur an official technical. We have ref Ed Malloy to thank, as he probably played a part in getting the foul taken back. Westbrook will play in tonight's game against the Blazers. Should the Thunder make the playoffs, Westbrook's technical foul count would be reset.