Simplify cylc clean reinvocation check

cylc/flow/clean.py

@@ -117,12 +117,8 @@ def _clean_check(opts: 'Values', id_: str, run_dir: Path) -> None:
  # Thing to clean must be a dir or broken symlink:
  if not run_dir.is_dir() and not run_dir.is_symlink():
  raise FileNotFoundError(f"No directory to clean at {run_dir}")
- db_path = (
- run_dir / WorkflowFiles.Service.DIRNAME / WorkflowFiles.Service.DB
- )
- if opts.local_only and not db_path.is_file():
- # Will reach here if this is cylc clean re-invoked on remote host
- # (workflow DB only exists on scheduler host); don't need to worry
+ if opts.no_scan:
+ # This is cylc clean re-invoked on remote host; don't need to worry
  # about contact file.
  return
  try: