2755: Cleaned up documentation

Author: rimi-itk

README.md

@@ -10,34 +10,6 @@
 OS2loop is a question-answering system built on Drupal 9. See [os2.eu/produkt/os2loop](https://os2.eu/produkt/os2loop)
 (in Danish) for more information.
 
-## Upgrading to Drupal 10
-
-Upgrading to [Drupal 10](https://www.drupal.org/about/10) is a two-step process:
-first the site must be prepared for the upgrade ([tag:
-d-10-prepare](/releases/tag/d-10-prepare)) and then the actual upgrade must be
-performed.
-
-```sh
-# Backup the database
-
-# Prepare for the upgrade
-git checkout d-10-prepare
-composer install --no-dev --optimize-autoloader
-vendor/bin/drush --yes pm:uninstall samlauth
-vendor/bin/drush --yes deploy
-vendor/bin/drush --yes locale:update
-vendor/bin/drush --yes cache:rebuild
-
-# Check that site still works
-
-# Upgrade to Drupal 10
-git checkout «release tag»
-composer install --no-dev --optimize-autoloader
-vendor/bin/drush --yes deploy
-vendor/bin/drush --yes locale:update
-vendor/bin/drush --yes cache:rebuild
-```
-
 ## Installation
 
 ### Production