Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Trying to delete duplicate after scan completed, and i got this error

`Application Name: dupeGuru
Version: 4.2.1
Python: 3.8.10
Operating System: Linux-5.14.0-1031-oem-x86_64-with-glibc2.29

Traceback (most recent call last):
File "/home/chchia/dupeguru/hscommon/gui/progress_window.py", line 102, in pulse
should_continue = self._error_func(self.jobid, err)
File "/home/chchia/dupeguru/core/app.py", line 330, in _job_error
raise err
File "/home/chchia/dupeguru/hscommon/jobprogress/performer.py", line 45, in _async_run
target(*args)
File "/home/chchia/dupeguru/core/app.py", line 232, in _do_delete
self.results.perform_on_marked(op, True)
File "/home/chchia/dupeguru/core/results.py", line 302, in perform_on_marked
func(dupe)
File "/home/chchia/dupeguru/core/app.py", line 229, in op
return self._do_delete_dupe(dupe, link_deleted, use_hardlinks, direct_deletion)
File "/home/chchia/dupeguru/core/app.py", line 251, in _do_delete_dupe
self.clean_empty_dirs(dupe.path.parent())
TypeError: 'PosixPath' object is not callable`