diff --git a/scripts/upgrade b/scripts/upgrade
index 084b0d7..d0f9e62 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -9,39 +9,8 @@
 source _common.sh
 source /usr/share/yunohost/helpers
 
-### This helper will compare the version of the currently installed app and the version of the upstream package.
-### $upgrade_type can have 2 different values
-### - UPGRADE_APP if the upstream app version has changed
-### - UPGRADE_PACKAGE if only the YunoHost package has changed
-### ynh_check_app_version_changed will stop the upgrade if the app is up to date.
-### UPGRADE_APP should be used to upgrade the core app only if there's an upgrade to do.
 upgrade_type=$(ynh_check_app_version_changed)
 
-#=================================================
-# STANDARD UPGRADE STEPS
-#=================================================
-# ENSURE DOWNWARD COMPATIBILITY
-#=================================================
-#ynh_script_progression --message="Ensuring downward compatibility..." --weight=1
-
-#
-# N.B. : the followings setting migrations snippets are provided as *EXAMPLES*
-# of what you may want to do in some cases (e.g. a setting was not defined on
-# some legacy installs and you therefore want to initiaze stuff during upgrade)
-#
-
-# If db_name doesn't exist, create it
-#if [ -z "$db_name" ]; then
-#	db_name=$(ynh_sanitize_dbid --db_name=$app)
-#	ynh_app_setting_set --app=$app --key=db_name --value=$db_name
-#fi
-
-# If install_dir doesn't exist, create it
-#if [ -z "$install_dir" ]; then
-#	install_dir=/var/www/$app
-#	ynh_app_setting_set --app=$app --key=install_dir --value=$install_dir
-#fi
-
 #=================================================
 # "REBUILD" THE APP (DEPLOY NEW SOURCES, RERUN NPM BUILD, ETC...)
 #=================================================
@@ -56,9 +25,6 @@ then
 	ynh_setup_source --dest_dir="$install_dir"
 fi
 
-# $install_dir will automatically be initialized with some decent 
-# permission by default ... however, you may need to recursively reapply
-# ownership to all files such as after the ynh_setup_source step
 chown -R $app:www-data "$install_dir"
 
 #=================================================
@@ -68,7 +34,6 @@ ynh_script_progression --message="Upgrading system configurations related to $ap
 
 ynh_add_nginx_config
 
-
 #=================================================
 # END OF SCRIPT
 #=================================================