Don Lemon is set to return to the air on Wednesday after beign removed from CNN This Morning over sexist comments he made about Republican presidential candidate Nikki Haley’s age.The longtime host will reportedly be taking part in “formal training” to help him understand why what he said was wrong. According to Brian Stelter, CNN CEO Chris Licht sent a memo to staff on Monday outlining the situation.“I sat down with Don and had a frank and meaningful conversation,” Licht said. “He has agreed to participate in formal training, as well as continuing to listen and learn. We take this situation very seriously.”“It is important to me that CNN balances accountability with a fostering a culture in which people can own, learn and grow from their mistakes,” Licht continued, revealing that, “to that end, Don will return to CNN This Morning on Wednesday.” Lemon made his remarks on Thursday’s episode of the show when the conversation turned to age in politics.“Nikki Haley isn’t in her prime, sorry,” Lemon said. “When a woman is considered to be in her prime in her 20s, and 30s, and maybe 40s.”“Prime …