Updates for d9 compat.

Closes #3217949

drush/easychart.drush.inc

@@ -5,6 +5,8 @@
  * Easychart drush functions.
  */
 
+use Symfony\Component\Filesystem\Filesystem;
+
 /**
  * Implements hook_drush_command().
  */
@@ -64,7 +66,7 @@ function easychart_drush_dependencies() {
 
     // Remove Easychart library directory.
     if (is_dir($easychart_dir_name)) {
-      drush_delete_dir($easychart_dir_name, TRUE);
+      FileSystem::remove($easychart_dir_name);
       drush_log(dt('An existing Easychart plugin was deleted from @libraries_path.', array('@libraries_path' => $libraries_path)), 'success');
     }
 
@@ -86,7 +88,7 @@ function easychart_drush_dependencies() {
 
     // Remove any existing Highcharts library directory.
     if (is_dir($highcharts_dir_name)) {
-      drush_delete_dir($highcharts_dir_name, TRUE);
+      Filesystem::remove($highcharts_dir_name);
       drush_log(dt('An existing Highcharts plugin was deleted from @libraries_path.', array('@libraries_path' => $libraries_path)), 'success');
     }