* signal.c (sigsegv): suppress unused result warning. Because
  write(2) is marked __warn_unused_result__ on Linux glibc.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39445 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
remove duplicated entry.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39446 b2dd03c8-39d4-4d8f-98ff-823fe69b080e