test_rinda.rb: no fork

* test/rinda/test_rinda.rb (have_fork?): no longer used already.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41422 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/rinda/test_rinda.rb

@@ -522,13 +522,6 @@ class TupleSpaceProxyTest < Test::Unit::TestCase
     Process.wait(take)  if take
   end
 
-  def have_fork?
-    Process.fork {}
-    return true
-  rescue NotImplementedError
-    return false
-  end
-
   @server = DRb.primary_server || DRb.start_service
 end