diff --git a/scripts/backup b/scripts/backup
index ab3fad6..c894a56 100755
--- a/scripts/backup
+++ b/scripts/backup
@@ -14,10 +14,6 @@ source /usr/share/yunohost/helpers
 # MANAGE SCRIPT FAILURE
 #=================================================
 
-ynh_clean_setup () {
-	### Remove this function if there's nothing to clean before calling the remove script.
-	true
-}
 # Exit if an error occurs during the execution of the script
 ynh_abort_if_errors
 
diff --git a/scripts/install b/scripts/install
index 5b34282..5e07de2 100755
--- a/scripts/install
+++ b/scripts/install
@@ -13,10 +13,6 @@ source /usr/share/yunohost/helpers
 # MANAGE SCRIPT FAILURE
 #=================================================
 
-ynh_clean_setup () {
-	### Remove this function if there's nothing to clean before calling the remove script.
-	true
-}
 # Exit if an error occurs during the execution of the script
 ynh_abort_if_errors
 
diff --git a/scripts/restore b/scripts/restore
index df7d683..a80e9f4 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -14,10 +14,6 @@ source /usr/share/yunohost/helpers
 # MANAGE SCRIPT FAILURE
 #=================================================
 
-ynh_clean_setup () {
-    #### Remove this function if there's nothing to clean before calling the remove script.
-    true
-}
 # Exit if an error occurs during the execution of the script
 ynh_abort_if_errors
 
diff --git a/scripts/upgrade b/scripts/upgrade
index e7e6531..261a4e8 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -20,7 +20,6 @@ domain=$(ynh_app_setting_get --app=$app --key=domain)
 path_url=$(ynh_app_setting_get --app=$app --key=path)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 language=$(ynh_app_setting_get --app=$app --key=language)
-calibre=$(ynh_app_setting_get --app=$app --key=calibre)
 
 #=================================================
 # CHECK VERSION