Manual test suite: remove automated test case.

wiki/src/contribute/release_process/test.mdwn

@@ -307,8 +307,6 @@ language. You *really* have to reboot between each language.
 * Check that Tails Greeter's "more options" screen displays properly
   on a display with 600 px height, preferably in a language that's
   more verbose than English (e.g. French). (automate: [[!tails_ticket 10276]])
-* `sudo systemctl is-system-running` should print `running`
-  (automate: [[!tails_ticket 8262]])
 * Check that all seems well during init: (automate: [[!tails_ticket 10277]])
   - `systemctl --failed --all` should say `0 loaded units listed`
   - the output of `journalctl` should seem OK.