[1816969] Use AT_NO_ATK in mon-data.h for unused monster attacks (bobbens).

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@2501 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dshaligram  on October 21, 2007
S6SJSGXKHMDFIDXI2DSFX4W5W4HV36XO5KRXCXGKJUGWCKGHUHKQC
Change contents