revert a part of r60163.

* test/ruby/test_settracefunc.rb (test_trace_point_binding_in_ifunc):
  do not need other threads because this script is invoked by another
  ruby process (and also remove typo).


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60164 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_settracefunc.rb

@@ -925,7 +925,6 @@ class TestSetTraceFunc < Test::Unit::TestCase
     bug7774 = '[ruby-dev:46908]'
     src = %q{
       tp = TracePoint.new(:raise) do |tp|
-        next unless target_thread?g
         tp.binding
       end
       tp.enable do