Pop star Lizzo has rerecorded a song, stripping out an offending lyric that she learned was ableist. “It’s been brought to my attention that there is a harmful word in my new song ‘GRRRLS,’ ” she said on Twitter Monday. “Let me make one thing clear: I never want to promote derogatory language.” The song contained the line, as she sings over a Beastie Boys sample, “Hold my bag/ Do you see this s—?/ I’m a sp-z/ I’m about to knock somebody out/ Yo, where my best friend?/ She the only one I know to talk me off the deep end.” Disability advocates immediately lashed out on Twitter, informing her t…