Ruby

remove unnecessary enumerator requires

• lib/rinda/tuplespace.rb: remove enumerator require
• test/pathname/test_pathname.rb: ditto

Related to https://bugs.ruby-lang.org/issues/10902
but not a complete fix.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51274 b2dd03c8-39d4-4d8f-98ff-823fe69b080e