[GRASS-git] [OSGeo/grass] c9e857: Minor cleanup of CHANGES file (#2327)

[Markus Neteler]

  Branch: refs/heads/main
  Home:   https://github.com/OSGeo/grass
  Commit: c9e8576cf4fbb60c1230ad81eb6fbb453f7981b7
      https://github.com/OSGeo/grass/commit/c9e8576cf4fbb60c1230ad81eb6fbb453f7981b7
  Author: Markus Neteler <neteler at gmail.com>
  Date:   2022-04-26 (Tue, 26 Apr 2022)

  Changed paths:
    M CHANGES
    M NEWS
    R SUBMITTING

  Log Message:
  -----------
  Minor cleanup of CHANGES file (#2327)

* SUBMITTING no longer needed; see CONTRIBUTING.md
* simplify CHANGES file