def METHOD_NAME(clusterfuzz_deployment, out_dir,
                                   files_changed, repo_path):
  """Removes all non affected fuzz targets in the out directory.
  Args:
    clusterfuzz_deployment: The ClusterFuzz deployment object.
    out_dir: The location of the fuzz target binaries.
    files_changed: A list of files changed compared to HEAD.
    repo_path: The location of the OSS-Fuzz repo in the docker image.
  This function will not delete fuzz targets unless it knows that the fuzz
  targets are unaffected. For example, this means that fuzz targets which don't
  have coverage data on will not be deleted.
  """
  if not files_changed:
    # Don't remove any fuzz targets if there is no difference from HEAD.
    logging.info('No files changed compared to HEAD.')
    return
  logging.info('Files changed in PR: %s', files_changed)
  fuzz_target_paths = utils.get_fuzz_targets(out_dir)
  if not fuzz_target_paths:
    # Nothing to remove.
    logging.error('No fuzz targets found in out dir.')
    return
  coverage = clusterfuzz_deployment.get_coverage(repo_path)
  if not coverage:
    # Don't remove any fuzz targets unless we have data.
    logging.error('Could not find latest coverage report.')
    return
  affected_fuzz_targets = get_affected_fuzz_targets(coverage, fuzz_target_paths,
                                                    files_changed)
  if not affected_fuzz_targets:
    logging.info('No affected fuzz targets detected, keeping all as fallback.')
    return
  logging.info('Using affected fuzz targets: %s.', affected_fuzz_targets)
  unaffected_fuzz_targets = set(fuzz_target_paths) - affected_fuzz_targets
  logging.info('Removing unaffected fuzz targets: %s.', unaffected_fuzz_targets)
  # Remove all the targets that are not affected.
  for fuzz_target_path in unaffected_fuzz_targets:
    try:
      os.remove(fuzz_target_path)
    except OSError as error:
      logging.error('%s occurred while removing file %s', error,
                    fuzz_target_path)