message: [dotest] remove confirm_directory_exclusivity remnants
diff: @@ -70,15 +70,6 @@ from . import test_categories
  from lldbsuite.support import encoded_file
  from lldbsuite.support import funcutils
  -# dosep.py starts lots and lots of dotest instances
  -# This option helps you find if two (or more) dotest instances are using the same
  -# directory at the same time
  -# Enable it to cause test failures and stderr messages if dotest instances try to run in
  -# the same directory simultaneously
  -# it is disabled by default because it litters the test directories with
  -# ".dirlock" files
  -debug_confirm_directory_exclusivity = False
  -
  # See also dotest.parseOptionsAndInitTestdirs(), where the environment variables
  # LLDB_COMMAND_TRACE and LLDB_DO_CLEANUP are set from '-t' and '-r dir'
  # options.
  @@ -586,10 +577,6 @@ class Base(unittest2.TestCase):
  exc_type, exc_value, exc_tb = sys.exc_info()
  traceback.print_exception(exc_type, exc_value, exc_tb)
  - if debug_confirm_directory_exclusivity:
  - cls.dir_lock.release()
  - del cls.dir_lock
  -
  # Restore old working directory.
  if traceAlways:
  print("Restore dir to:", cls.oldcwd, file=sys.stderr)
  