remove garbage line.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36168 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

Author: akr

ChangeLog

@@ -16,7 +16,6 @@ Thu Jun 21 20:34:19 2012  Tanaka Akira  <[email protected]>
 	  (rb_check_exec_options): ditto.
 	  (check_exec_options_i): ditto.
 
-	the third argument 
 Thu Jun 21 19:48:05 2012  Tanaka Akira  <[email protected]>
 
 	* process.c (rb_exec_async_signal_safe): use rb_execarg_run_options