Bugfix: Don't create /usr/share/mysql/*.flag files (Closes: #985870)

A major sync of upstream pacakging accidentally included some lines that were ancient and should not have been imported on 10.5 in Debian: https://salsa.debian.org/mariadb-team/mariadb-10.5/-/commit/2039c2755d0c642718dcc8be852174205577542b Upstream packaging seems to have introduced this line 9 years ago: https://github.com/MariaDB/server/commit/cfd4fcb0bc3d469dfca74dae30d17250d65fdd91#diff-733e7d6cfbf529c0530e7b06c97071e2c7dafa6d8b673495fecdce3f1d57015bR139 These lines are now also being removed upstream in: https://github.com/MariaDB/server/pull/1825

Bugfix: Don't create /usr/share/mysql/*.flag files (Closes: #985870)
A major sync of upstream pacakging accidentally included some lines that were ancient and should not have been imported on 10.5 in Debian: https://salsa.debian.org/mariadb-team/mariadb-10.5/-/commit/2039c2755d0c642718dcc8be852174205577542b Upstream packaging seems to have introduced this line 9 years ago: https://github.com/MariaDB/server/commit/cfd4fcb0bc3d469dfca74dae30d17250d65fdd91#diff-733e7d6cfbf529c0530e7b06c97071e2c7dafa6d8b673495fecdce3f1d57015bR139 These lines are now also being removed upstream in: https://github.com/MariaDB/server/pull/1825
902910b9 · Otto Kekäläinen · 4339aa05 · 902910b9
Commit 902910b9 authored 4 years ago by Otto Kekäläinen
--- a/debian/mariadb-server-10.5.postinst
+++ b/debian/mariadb-server-10.5.postinst
@@ -175,9 +175,6 @@ EOF
                                   $ERR_LOGGER
    set -e

-    # To avoid downgrades.
-    touch "$mysql_statedir/debian-$MAJOR_VER.flag"
-
    # On new installations root user can connect via unix_socket.
    # But on upgrades, scripts rely on debian-sys-maint user and
    # credentials in /etc/mysql/debian.cnf