* test/test_find.rb: remove unused variables.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45019 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* test/test_pty.rb: use underscore variables. because ignored unseued variables.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45020 b2dd03c8-39d4-4d8f-98ff-823fe69b080e