diff --git a/scripts/_common.sh b/scripts/_common.sh
index 07c27b7..24bd7ba 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -11,59 +11,3 @@ ynh_delete_file_checksum () {
 	local checksum_setting_name=checksum_${1//[\/ ]/_}	# Replace all '/' and ' ' by '_'
 	ynh_app_setting_delete $app $checksum_setting_name
 }
-
-ynh_install_php7 () {
-
-  ynh_package_update
-  ynh_package_install apt-transport-https --no-install-recommends
-
-  wget -q -O /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg
-  echo "deb https://packages.sury.org/php/ $(lsb_release -sc) main" | sudo tee /etc/apt/sources.list.d/php7.list
-
-  ynh_package_update
-  ynh_install_app_dependencies php7.1 php7.1-zip php7.1-fpm php7.1-mysql php7.1-xml php7.1-intl php7.1-mbstring php7.1-gd php7.1-curl php7.1-soap php7.1-pgsql php7.1-xmlrpc postgresql-9.4
-  sudo update-alternatives --install /usr/bin/php php /usr/bin/php5 70
-}
-
-ynh_remove_php7 () {
-  sudo rm -f /etc/apt/sources.list.d/php7.list
-  sudo apt-key del 4096R/89DF5277
-  sudo apt-key del 2048R/11A06851
-  ynh_remove_app_dependencies php7.1 php7.1-zip php7.1-fpm php7.1-mysql php7.1-xml php7.1-intl php7.1-mbstring php7.1-gd php7.1-curl php7.1-soap php7.1-pgsql php7.1-xmlrpc postgresql-9.4
-}
-
-
-# Create a dedicated php-fpm config for php7.1
-#
-# usage: ynh_add_fpm_config
-ynh_add_php7.1-fpm_config () {
-	finalphpconf="/etc/php/7.1/fpm/pool.d/$app.conf"
-	ynh_backup_if_checksum_is_different "$finalphpconf"
-	sudo cp ../conf/php-fpm.conf "$finalphpconf"
-	ynh_replace_string "__NAMETOCHANGE__" "$app" "$finalphpconf"
-	ynh_replace_string "__FINALPATH__" "$final_path" "$finalphpconf"
-	ynh_replace_string "__USER__" "$app" "$finalphpconf"
-	sudo chown root: "$finalphpconf"
-	ynh_store_file_checksum "$finalphpconf"
-
-	if [ -e "../conf/php-fpm.ini" ]
-	then
-		finalphpini="/etc/php/7.1/fpm/conf.d/20-$app.ini"
-		ynh_backup_if_checksum_is_different "$finalphpini"
-		sudo cp ../conf/php-fpm.ini "$finalphpini"
-		sudo chown root: "$finalphpini"
-		ynh_store_file_checksum "$finalphpini"
-	fi
-
-	sudo systemctl reload php7.1-fpm
-}
-
-
-# Remove the dedicated php-fpm config for php7.1
-#
-# usage: ynh_remove_fpm_config
-ynh_remove_php7.1-fpm_config () {
-	ynh_secure_remove "/etc/php/7.1/fpm/pool.d/$app.conf"
-	ynh_secure_remove "/etc/php/7.1/fpm/conf.d/20-$app.ini" 2>&1
-	sudo systemctl reload php7.1-fpm
-}