Revert "require "test/unit/runner/junitxml" if launchable env is configured"

This reverts commit 8d205e4.

Author: ono-max

test/support/test_case.rb

@@ -7,15 +7,12 @@
 require 'timeout'
 require 'json'
 require 'rbconfig'
+# "test/unit/runner/junitxml" is used for reporting test result in JUnit XML format.
+require "test/unit/runner/junitxml"
 require_relative '../../lib/debug/client'
 
 require_relative 'assertions'
 
-if ENV['LAUNCHABLE_ORGANIZATION'] && ENV['LAUNCHABLE_WORKSPACE']
-  # "test/unit/runner/junitxml" is used for reporting test result in JUnit XML format.
-  require "test/unit/runner/junitxml"
-end
-
 module DEBUGGER__
   class TestCase < Test::Unit::TestCase
     TestInfo = Struct.new(:queue, :mode, :prompt_pattern, :remote_info,