Remove unused variable

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39886 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* addr2line.c (kprintf): added from FreeBSD libstand's printf.
  this is consided as async signal safe function.

* addr2line.c (rb_dump_backtrace_with_lines): use kfprintf.
  [Bug #8144] [ruby-core:53632]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39887 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2013-03-24

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39888 b2dd03c8-39d4-4d8f-98ff-823fe69b080e