[GRASS-git] [OSGeo/grass] 99c97b: remove unused banner files

[Anna Petrasova]

  Branch: refs/heads/new-splash-screen
  Home:   https://github.com/OSGeo/grass
  Commit: 99c97b5f33aae01a82a750cc8aaab1a1b87a6ad9
      https://github.com/OSGeo/grass/commit/99c97b5f33aae01a82a750cc8aaab1a1b87a6ad9
  Author: Anna Petrasova <kratochanna at gmail.com>
  Date:   2021-08-17 (Tue, 17 Aug 2021)

  Changed paths:
    R gui/images/startup_banner.png
    R gui/images/startup_banner.svg
    R gui/images/startup_banner.txt
    R gui/images/startup_banner_isis.png

  Log Message:
  -----------
  remove unused banner files