Revert "Apply timeout-scale to test_thr_kill."

[junaruga]

This reverts commit bbbec4b.
Because the commit is a bug. The bug was reported on the commit link bbbec4b. The apply_timeout_scale to scale the timeout is called 2 times in the process.

The test/ruby/test_thread_queue.rb#test_thr_kill is calling EnvUtil.apply_timeout_scale, and
calling tool/lib/core_assertions.rb#assert_normal_exit. calling tool/lib/envutil.rb#invoke_ruby (EnvUtil.invoke_ruby) calling the apply_timeout_scale.

I confirmed the issues by adding the debug log after each EnvUtil.apply_timeout_scale.

diff --git a/test/ruby/test_thread_queue.rb b/test/ruby/test_thread_queue.rb
index 3d2d1b23e9..09c33d1561 100644
--- a/test/ruby/test_thread_queue.rb
+++ b/test/ruby/test_thread_queue.rb
@@ -209,6 +209,7 @@ def test_thr_kill
     bug5343 = '[ruby-core:39634]'
     Dir.mktmpdir {|d|
       timeout = EnvUtil.apply_timeout_scale(60)
+      puts "[DEBUG] test/ruby/test_thread_queue.rb#test_thr_kill.: timeout: #{timeout}"
       total_count = 250
       begin
         assert_normal_exit(<<-"_eom", bug5343, timeout: timeout, chdir: d)
diff --git a/tool/lib/envutil.rb b/tool/lib/envutil.rb
index 728ca7059b..a4c4c7304f 100644
--- a/tool/lib/envutil.rb
+++ b/tool/lib/envutil.rb
@@ -130,6 +130,7 @@ def invoke_ruby(args, stdin_data = "", capture_stdout = false, capture_stderr =
                   rubybin: EnvUtil.rubybin, precommand: nil,
                   **opt)
     timeout = apply_timeout_scale(timeout)
+    puts "[DEBUG] tool/lib/envutil.rb#invoke_ruby: timeout: #{timeout}"
 
     in_c, in_p = IO.pipe
     out_p, out_c = IO.pipe if capture_stdout

The timeout is scaling from 60 to 120 and to 240 seconds.

$ make test-all V=1 TESTS="-v test/ruby/test_thread_queue.rb -n TestThreadQueue#test_thr_kill --timeout-scale=2"
[1/0] TestThreadQueue#test_thr_kill[DEBUG] test/ruby/test_thread_queue.rb#test_thr_kill.: timeout: 120.0
[DEBUG] tool/lib/envutil.rb#invoke_ruby: timeout: 240.0
 = 0.07 s
Finished tests in 0.074814s, 13.3665 tests/s, 66.8323 assertions/s.
1 tests, 5 assertions, 0 failures, 0 errors, 0 skips