message: [CMake] Remove legacy LIBOMP_LIT_ARGS
  The bots have been updated, this option isn't needed anymore.
diff: @@ -51,10 +51,6 @@ if (${OPENMP_STANDALONE_BUILD})
  if (MSVC OR XCODE)
  set(DEFAULT_LIT_ARGS "${DEFAULT_LIT_ARGS} --no-progress-bar")
  endif()
  - # TODO: Remove once bots are updated to use the new option.
  - if (DEFINED LIBOMP_LIT_ARGS)
  - set(DEFAULT_LIT_ARGS ${LIBOMP_LIT_ARGS})
  - endif()
  set(OPENMP_LIT_ARGS "${DEFAULT_LIT_ARGS}" CACHE STRING "Options for lit.")
  separate_arguments(OPENMP_LIT_ARGS)
  else()
  