diff --git a/course/classes/output/bulk_activity_completion_renderer.php b/course/classes/output/bulk_activity_completion_renderer.php
index e6ea0a3f965..f923baa333f 100644
--- a/course/classes/output/bulk_activity_completion_renderer.php
+++ b/course/classes/output/bulk_activity_completion_renderer.php
@@ -126,8 +126,12 @@ class core_course_bulk_activity_completion_renderer extends plugin_renderer_base
      * @param moodleform $form
      * @param array $modules
      * @return string
+     * @deprecated since Moodle 4.3 MDL-78528
+     * @todo MDL-78711 This will be deleted in Moodle 4.7
      */
     public function edit_default_completion($form, $modules) {
+        debugging('edit_default_completion() is deprecated and will be removed.', DEBUG_DEVELOPER);
+
         ob_start();
         $form->display();
         $formhtml = ob_get_contents();
diff --git a/course/editdefaultcompletion.php b/course/editdefaultcompletion.php
deleted file mode 100644
index 9a73f39ad83..00000000000
--- a/course/editdefaultcompletion.php
+++ /dev/null
@@ -1,74 +0,0 @@
-<?php
-// This file is part of Moodle - http://moodle.org/
-//
-// Moodle is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// Moodle is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
-
-/**
- * Bulk activity completion selection
- *
- * @package     core_completion
- * @copyright   2017 Marina Glancy
- * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
-
-require_once(__DIR__ . "/../config.php");
-require_once($CFG->libdir . '/completionlib.php');
-
-$courseid = required_param('id', PARAM_INT);
-$modids = optional_param_array('modids', [], PARAM_INT);
-$course = get_course($courseid);
-require_login($course);
-
-navigation_node::override_active_url(new moodle_url('/course/completion.php', array('id' => $course->id)));
-$PAGE->set_url(new moodle_url('/course/editdefaultcompletion.php', ['id' => $courseid]));
-$PAGE->set_title($course->shortname);
-$PAGE->set_heading($course->fullname);
-$PAGE->set_pagelayout('admin');
-
-require_capability('moodle/course:manageactivities', context_course::instance($course->id));
-
-// Prepare list of selected modules.
-$manager = new \core_completion\manager($course->id);
-$allmodules = $manager->get_activities_and_resources();
-$modules = [];
-foreach ($allmodules->modules as $module) {
-    if ($module->canmanage && in_array($module->id, $modids)) {
-        $modules[$module->id] = $module;
-    }
-}
-
-$returnurl = new moodle_url('/course/defaultcompletion.php', ['id' => $course->id]);
-if (empty($modules)) {
-    redirect($returnurl);
-}
-
-$form = new core_completion_defaultedit_form(null, ['course' => $course, 'modules' => $modules]);
-
-if ($form->is_cancelled()) {
-    redirect($returnurl);
-} else if ($data = $form->get_data()) {
-    $manager->apply_default_completion($data, $form->has_custom_completion_rules());
-    redirect($returnurl);
-}
-
-$renderer = $PAGE->get_renderer('core_course', 'bulk_activity_completion');
-
-echo $OUTPUT->header();
-
-echo $OUTPUT->heading(get_string('defaultcompletion', 'completion'));
-
-echo $renderer->edit_default_completion($form, $modules);
-
-echo $OUTPUT->footer();
-
diff --git a/course/upgrade.txt b/course/upgrade.txt
index 5300481c74f..72e6adb8218 100644
--- a/course/upgrade.txt
+++ b/course/upgrade.txt
@@ -6,6 +6,7 @@ information provided here is intended especially for developers.
 * External function core_course_external::get_course_contents() now returns a new field activitybadge with the data to display
   the activity badge when the module implements it.
 * prepare_new_moduleinfo_data() now accepts a parameter "suffix" that will be added to the name of the completion rules.
+* The method core_course_bulk_activity_completion_renderer:: edit_default_completion() has been deprecated and will be removed.
 
 === 4.2 ===
 * course/mod.php now accepts parameter beforemod for adding course modules. It contains the course module id