* test/rubygems/test_gem_package_tar_header.rb: remove tempfiles.
* test/rubygems/test_gem_package_tar_reader.rb: ditto.
* test/rubygems/test_gem_package_tar_reader_entry.rb (teardown):
  ditto.
* test/rubygems/test_gem_package_tar_writer.rb (teardown): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46144 b2dd03c8-39d4-4d8f-98ff-823fe69b080e