Hide clean all exercise icon see BT#17270

main/exercise/exercise.php

@@ -548,6 +548,8 @@ if ($is_allowedToEdit && $origin !== 'learnpath') {
     $actionsLeft .= '<a href="'.api_get_path(WEB_CODE_PATH).'exercise/upload_exercise.php?'.api_get_cidreq().'">'.
         Display::return_icon('import_excel.png', get_lang('ImportExcelQuiz'), '', ICON_SIZE_MEDIUM).'</a>';
 
+    $cleanAll = null;
+    if (api_is_platform_admin() || false === $limitTeacherAccess) {
         $cleanAll = Display::url(
             Display::return_icon(
                 'clean_all.png',
@@ -563,6 +565,7 @@ if ($is_allowedToEdit && $origin !== 'learnpath') {
                 'data-target' => '#confirm-delete',
             ]
         );
+    }
 
     if ($limitTeacherAccess) {
         if (api_is_platform_admin()) {