Actually, that's not true. I'm going to blatantly plagiarise something I recently wrote for U2-Vertigo-Tour.com because I'm too lazy to write it again:
Boy is the only album from which every single song has been played to a paying crowd, and Shadows And Tall Trees was the first to disappear from U2's setlists - sporadic appearances from 1978 to the middle of 1980 are recorded and it is assumed it was played more regularly, but it is not known to have appeared on the Boy Tour that began in September 1980, and hasn't appeared on subsequent tours. Out of subsequent albums, three come extremely close to being fully played live. Pop comes the closest with every single song being featured in some form live; eleven of its twelve songs were performend live, and the twelfth, The Playboy Mansion, was sometimes snippeted at the end of Where The Streets Have No Name on the Popmart Tour. Recordings of live performances of every Achtung Baby song exist, but the recording of Acrobat was made by a fan outside a closed venue in which U2 were rehearsing. Acrobat has never been played live to an audience. The Joshua Tree came extremely close to being performed live in full; the only song not played thus far is Red Hill Mining Town, which U2 are known to have extensively soundchecked before the 28 November 1987 concert in Murfreesboro, Tennessee as they had plans to perform it in late December in Tempe, Arizona so it could be filmed for inclusion in Rattle And Hum. Unfortunately, these plans did not come to fruition.
