Benno Schulenberg 384c9aaad3 tweaks: delete a ChangeLog that is no longer updated and is incomplete
It is incomplete at the top, in the middle, and at the bottom.

Also, the Makefile from gettext automatically includes this ChangeLog
in a release tarball when the ChangeLog exists.  This is an unneeded
burden on the tarball, as I don't think any distro installs this file
in nano's doc directory.  And if any does, I don't think they should:
it is not helpful for using nano.

If anyone would like to know more about the history of a PO file,
since we now have git, they can do something like:

        git log -p po/<LANGUAGECODE>.po |
        grep -e Revision-Date -e Last-Translator |
        grep -A1 "^\+.PO" | less
2020-03-26 13:17:21 +01:00
..