By Chris Mannix Who makes the cut ahead of Saturday’s historic bout between Katie Taylor and Amanda Serrano at Madison Square Garden? NEW YORK – “A moment in time” is what Eddie Hearn calls it. While Hearn, the promoter of record for Saturday’s lightweight showdown between Katie Taylor and Amanda Serrano, is supposed to be hyperbolic about his fights, the statement rings true. Everything about Taylor-Serrano screams event, from appearances on the Today show to glossy magazine profiles (read ours, by the way) to the hundreds of credential requests to attend the first women’s boxing match to hea…