message: Fix duplicated trisycl_include_dir
  A recent botched three-way-merge sync seems to have duplicated (more than once on Github) the set_trisycl_include_dir function. This change removes the duplicates in favor of a cleaned-up variant that I added in another recent change.
diff: @@ -1097,28 +1097,6 @@ def set_computecpp_toolkit_path(environ_cp):
  computecpp_toolkit_path)
  -def set_trisycl_include_dir(environ_cp):
  - """Set TRISYCL_INCLUDE_DIR."""
  - ask_trisycl_include_dir = ('Please specify the location of the triSYCL '
  - 'include directory. (Use --config=sycl_trisycl '
  - 'when building with Bazel) '
  - '[Default is %s]: ') % _DEFAULT_TRISYCL_INCLUDE_DIR
  - while True:
  - trisycl_include_dir = get_from_env_or_user_or_default(
  - environ_cp, 'TRISYCL_INCLUDE_DIR', ask_trisycl_include_dir,
  - _DEFAULT_TRISYCL_INCLUDE_DIR)
  - if os.path.exists(trisycl_include_dir):
  - break
  -
  - print('Invalid triSYCL include directory, %s cannot be found'
  - % (trisycl_include_dir))
  -
  - # Set TRISYCL_INCLUDE_DIR
  - environ_cp['TRISYCL_INCLUDE_DIR'] = trisycl_include_dir
  - write_action_env_to_bazelrc('TRISYCL_INCLUDE_DIR',
  - trisycl_include_dir)
  -
  -
  def set_trisycl_include_dir(environ_cp):
  """Set TRISYCL_INCLUDE_DIR."""
  