MDL-70821 course: Deprecate course_section_cm_completion()

Deprecate \core_course_renderer::course_section_cm_completion(). It is
not being used anymore and is being replaced by
\core_renderer::activity_information().

course/renderer.php

@@ -425,6 +425,10 @@ class core_course_renderer extends plugin_renderer_base {
      * If completion is manual, returns a form (with an icon inside) that allows user to
      * toggle completion
      *
+     * @deprecated since Moodle 3.11
+     * @todo MDL-71183 Final deprecation in Moodle 4.3.
+     * @see \core_renderer::activity_information
+     *
      * @param stdClass $course course object
      * @param completion_info $completioninfo completion info for the course, it is recommended
      *     to fetch once for all modules in course/section for performance
@@ -434,6 +438,10 @@ class core_course_renderer extends plugin_renderer_base {
      */
     public function course_section_cm_completion($course, &$completioninfo, cm_info $mod, $displayoptions = array()) {
         global $CFG, $DB, $USER;
+
+        debugging(__FUNCTION__ . ' is deprecated and is being replaced by the activity_information output component.',
+            DEBUG_DEVELOPER);
+
         $output = '';
 
         $istrackeduser = $completioninfo->is_tracked_user($USER->id);

course/upgrade.txt

@@ -46,6 +46,8 @@ renderer and course format renderer:
 
 === 3.11 ===
 * A new callback xxx_coursemodule_definition_after_data that allows plugins to extend activity forms after the data is set.
+* \core_course_renderer::course_section_cm_completion() has been deprecated. It is not being used anymore and is being replaced by
+  \core_renderer::activity_information().
 
 === 3.10 ===