Revert "Maintenance operations: fix user for multi-instance and apply at installation"

This reverts commit b2ec1be4b9.

scripts/install

@@ -241,11 +241,6 @@ ynh_replace_string "#DESTDIR#" "$final_path" "$cron_path"
 
 exec_occ background:cron
 
-#=================================================
-# POST-INSTALL MAINTENANCE
-#=================================================
-(cd /tmp ; at now + 10 minutes <<< "(cd $final_path ; sudo -u $app php occ db:add-missing-indices ; sudo -u $app php occ db:convert-filecache-bigint -n) > /tmp/nextcloud_maintenance.log")
-
 #=================================================
 # CONFIGURE THE HOOK FILE FOR USER CREATE
 #=================================================

scripts/upgrade.d/upgrade.last.sh

@@ -12,5 +12,5 @@ last_upgrade_operations () {
   cp -a ../sources/patches_last_version/* ../sources/patches
 
   # Execute post-upgrade operations later on
-  (cd /tmp ; at now + 10 minutes <<< "(cd $final_path ; sudo -u $app php occ db:add-missing-indices ; sudo -u $app php occ db:convert-filecache-bigint -n) > /tmp/nextcloud_maintenance.log")
+  (cd /tmp ; at now + 10 minutes <<< "(cd $final_path ; sudo -u nextcloud php occ db:add-missing-indices ; sudo -u nextcloud php occ db:convert-filecache-bigint -n) > /tmp/nextcloud_maintenance.log")
 }