Removes pipe SMGs from DDA

As discussed in http://smf.cataclysmdda.com/index.php?topic=8679.msg197956#msg197956 , removes smg_9mm and smg_45 from the game, in accordance with the design doc and phaseout.  You can't make a full-auto repeating mechanism with the tools available, and if you could, the guns themselves are still crap. 

(One of the main reasons SMG turrets were a joke back in the day was that they were armed with 9mm pipe SMGs rather than an actual gun.)