Courtesy George Gimarc/94.5 ReunionVery Edge-y: The Edge's Josh Venable with U2's The EdgeBack in January, Clear Channel laid off 1,800 employees, several of whom were good Friends of Unfair Park and most of whom worked in ad sales. Today comes news that the San Antonio-based conglomerate has laid off more folks in a second round of budget-cutting -- and gone even deeper in the talent pool, with several on-air folks among the 590 being let go. One radio trade pub is reporting that Alan Ayo -- a