diff --git a/.upgradenotes/MDL-80944-2025021015151688.yml b/.upgradenotes/MDL-80944-2025021015151688.yml
new file mode 100644
index 00000000000..fd0ecf116de
--- /dev/null
+++ b/.upgradenotes/MDL-80944-2025021015151688.yml
@@ -0,0 +1,5 @@
+issueNumber: MDL-80944
+notes:
+  mod_quiz:
+    - message: Final removal of quiz_delete_override() and quiz_delete_all_overrides()
+      type: removed
diff --git a/mod/quiz/deprecatedlib.php b/mod/quiz/deprecatedlib.php
index 5ab13a698ad..7774ff425d9 100644
--- a/mod/quiz/deprecatedlib.php
+++ b/mod/quiz/deprecatedlib.php
@@ -298,38 +298,17 @@ function quiz_calculate_best_attempt($quiz, $attempts) {
 }
 
 /**
- * Deletes a quiz override from the database and clears any corresponding calendar events
- *
- * @deprecated since Moodle 4.4
- * @todo MDL-80944 Final deprecation in Moodle 4.8
- * @param stdClass $quiz The quiz object.
- * @param int $overrideid The id of the override being deleted
- * @param bool $log Whether to trigger logs.
- * @return bool true on success
+ * @deprecated since Moodle 4.4 MDL-80300
  */
-#[\core\attribute\deprecated('override_manager::delete_override_by_id', since: '4.4')]
-function quiz_delete_override($quiz, $overrideid, $log = true) {
+#[\core\attribute\deprecated('override_manager::delete_override_by_id', since: '4.4', mdl: '80300', final: true)]
+function quiz_delete_override() {
     \core\deprecation::emit_deprecation_if_present(__FUNCTION__);
-    $quizsettings = quiz_settings::create($quiz->id);
-    $quizsettings->get_override_manager()->delete_overrides_by_id(
-        ids: [$overrideid],
-        shouldlog: $log,
-    );
-
-    return true;
 }
 
 /**
- * Deletes all quiz overrides from the database and clears any corresponding calendar events
- *
- * @deprecated since Moodle 4.4
- * @todo MDL-80944 Final deprecation in Moodle 4.8
- * @param stdClass $quiz The quiz object.
- * @param bool $log Whether to trigger logs.
+ * @deprecated since Moodle 4.4 MDL-80300
  */
-#[\core\attribute\deprecated('override_manager::delete_all_overrides', since: '4.4')]
-function quiz_delete_all_overrides($quiz, $log = true) {
+#[\core\attribute\deprecated('override_manager::delete_all_overrides', since: '4.4', mdl: '80300', final: true)]
+function quiz_delete_all_overrides() {
     \core\deprecation::emit_deprecation_if_present(__FUNCTION__);
-    $quizsettings = quiz_settings::create($quiz->id);
-    $quizsettings->get_override_manager()->delete_all_overrides(shouldlog: $log);
 }