code: def orphans_single(default_exec=False):
      
      if not default_exec and executable.endswith('uwsgi'):
          # default_exec => rq => sys.executable is sane
          _executable = executable[:-5] + 'python'
      else:
          _executable = executable
      p = subprocess.Popen([_executable, '-m', 'nikola', 'orphans'],
                           stdout=subprocess.PIPE)
      p.wait()
      files = [l.strip().decode('utf-8') for l in p.stdout.readlines()]
      for f in files:
          if f:
              os.unlink(f)
  
      out = '\n'.join(files)
      return p.returncode, out
docs: Remove all orphans in the site, in the single user-mode.