* lib/shell/command-processor.rb: remove unused variable.
* lib/shell/system-command.rb: ditto.
* lib/tmpdir.rb: ditto.
* lib/uri/generic.rb: ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46969 b2dd03c8-39d4-4d8f-98ff-823fe69b080e