For discussion, see the following thread:
https://lists.gnu.org/archive/html/emacs-devel/2019-04/msg01196.html
https://lists.gnu.org/archive/html/emacs-devel/2019-06/msg00967.html
* etc/TODO: Remove gnus-bug from list of obsolete bug-reporting
commands now that it is implemented in terms of report-emacs-bug.
** Check for any included packages that define obsolete bug-reporting commands.
Change them to use report-emacs-bug.
*** Related functions:
-**** gnus-bug
**** org-submit-bug-report
**** lm-report-bug
**** tramp-bug