backport r33019 from trunk.
iseq.c (iseq_s_disasm): remove variable which is no longer used since r33013.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@33020 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
backport r33019 from trunk.
iseq.c (iseq_s_disasm): remove variable which is no longer used
since r33013.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@33020 b2dd03c8-39d4-4d8f-98ff-823fe69b080e