Sorry, I don't see that file (directory?). Is there somewhere else it could be?
alkh3myst@R:~$ cd ~/.config/calibre
alkh3myst@R:~/.config/calibre$ ls
conversion global.py history.plist plugins
dynamic.pickle gui.json iterator.pickle tweaks.py
fonts gui.py metadata_sources viewer.json
alkh3myst@R:~/.config/calibre$ ls -a
. dynamic.pickle gui.json iterator.pickle tweaks.py
.. fonts gui.py metadata_sources viewer.json
conversion global.py history.plist plugins
alkh3myst@R:~/.config/calibre$