[enh] create blocks for MySQL and PHP command lines which are optionnals.

scripts/remove

@@ -12,21 +12,23 @@ domain=$(ynh_app_setting_get "$app" domain)
 # Remove sources
 sudo rm -rf /var/www/$app
 
-# Remove configuration files
+# Remove nginx configuration file
 sudo rm -f /etc/nginx/conf.d/$domain.d/$app.conf
 
+### PHP (remove if not used) ###
 # If a dedicated php-fpm process is used:
-#
 # sudo rm -f /etc/php5/fpm/pool.d/$app.conf
 # sudo service php5-fpm reload
+### PHP end ###
 
+### MySQL (remove if not used) ###
 # If a MySQL database is used:
-#
 # # Drop MySQL database and user
 # dbname=$app
 # dbuser=$app
 # ynh_mysql_drop_db "$dbname" || true
 # ynh_mysql_drop_user "$dbuser" || true
+### MySQL end ###
 
 # Reload nginx service
 sudo service nginx reload