Revert change back to deb11 branch

Author: jaapmarcus

install/hst-install-debian.sh

@@ -1627,9 +1627,7 @@ if [ "$dovecot" = 'yes' ]; then
     cp -rf $HESTIA_INSTALL_DIR/dovecot /etc/
     cp -f $HESTIA_INSTALL_DIR/logrotate/dovecot /etc/logrotate.d/
     chown -R root:root /etc/dovecot*
-    if [ "$release" -eq 9 ] || [ "$release" -eq 10 ]; then
-        rm -f /etc/dovecot/conf.d/15-mailboxes.conf
-    fi
+    rm -f /etc/dovecot/conf.d/15-mailboxes.conf
 
     #Alter config for 2.2 
     version=$(dovecot --version |  cut -f -2 -d .);