diff --git a/mod/data/lib.php b/mod/data/lib.php
index d76fd386196..907fdc84b9b 100755
--- a/mod/data/lib.php
+++ b/mod/data/lib.php
@@ -909,10 +909,6 @@ function data_delete_instance($id) {    // takes the dataid
     $fs = get_file_storage();
     $fs->delete_area_files($context->id, 'mod_data');
 
-    // Delete comments
-    require_once($CFG->dirroot.'/comment/lib.php');
-    comment::delete_comments(array('contextid'=>$context->id));
-
     // Delete ratings
     //delete ratings
     require_once($CFG->dirroot.'/rating/lib.php');
diff --git a/mod/glossary/lib.php b/mod/glossary/lib.php
index 3b34ef00037..b81cee8f344 100644
--- a/mod/glossary/lib.php
+++ b/mod/glossary/lib.php
@@ -195,10 +195,6 @@ function glossary_delete_instance($id) {
     $DB->delete_records_select('glossary_entries_categories', "categoryid IN ($category_select)", array($id));
     $DB->delete_records('glossary_categories', array('glossaryid'=>$id));
 
-    // Delete comments
-    require_once($CFG->dirroot.'/comment/lib.php');
-    comment::delete_comments(array('contextid'=>$context->id));
-
     // delete all files
     $fs->delete_area_files($context->id);