test_gc.rb: timeout of test_interrupt_in_finalizer

* test/ruby/test_gc.rb (test_interrupt_in_finalizer): leave
  timeout to invoke_ruby.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51540 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_gc.rb

@@ -340,9 +340,6 @@ class TestGc < Test::Unit::TestCase
           sleep 0.1
           Process.kill("INT", pid) rescue break
         }
-        sleep 5
-        Process.kill("SEGV", pid) rescue nil
-        Process.kill("KILL", pid) rescue nil
       end
       f = proc {1000.times {}}
       loop do