Revert r44778 #9375
It breaks test-all if all tests are in a single process
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@44786 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Added by naruse (Yui NARUSE) about 10 years ago
Revert r44778 #9375
It breaks test-all if all tests are in a single process
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@44786 b2dd03c8-39d4-4d8f-98ff-823fe69b080e