save-place-forget-unreadable-files
save-place-forget-unreadable-files is an interactive compiled Lisp function in `saveplace.el
'.
(save-place-forget-unreadable-files)
Remove unreadable files from `save-place-alist'.
For each entry in the alist, if `file-readable-p' returns nil for the
filename, remove the entry. Save the new alist (as the first pair
may have changed) back to `save-place-alist'.