Warning on uninstallation

If I uninstall the plugin, the following warning gets logged:

ErrorException: Warning: Undefined array key "del_plugin_data"
#7 /wp-content/plugins/svg-support/uninstall.php(7): include_once
#6 /wp-admin/includes/plugin.php(1241): uninstall_plugin
#5 /wp-admin/includes/plugin.php(958): delete_plugins
#4 /wp-admin/includes/ajax-actions.php(4698): wp_ajax_delete_plugin
#3 /wp-includes/class-wp-hook.php(308): WP_Hook::apply_filters
#2 /wp-includes/class-wp-hook.php(332): WP_Hook::do_action
#1 /wp-includes/plugin.php(517): do_action
#0 /wp-admin/admin-ajax.php(188): null