resolv.rb: remove unnecessary require statement

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59679 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2017-08-29 04:58:29 +00:00 · 2017-08-29 04:58:29 +00:00 · f70827b7cf
--- a/lib/resolv.rb
+++ b/lib/resolv.rb
@ -2,7 +2,6 @@

 require 'socket'
 require 'timeout'
-require 'thread'
 require 'io/wait'

 begin