diff --git a/mod/folder/lib.php b/mod/folder/lib.php
index c7598c8fc8e..255c7bb4f82 100644
--- a/mod/folder/lib.php
+++ b/mod/folder/lib.php
@@ -318,26 +318,6 @@ function folder_pluginfile($course, $cm, $context, $filearea, $args, $forcedownl
     send_stored_file($file, 86400, 0, true);
 }
 
-/**
- * This function extends the global navigation for the site.
- * It is important to note that you should not rely on PAGE objects within this
- * body of code as there is no guarantee that during an AJAX request they are
- * available
- *
- * @param navigation_node $navigation The folder node within the global navigation
- * @param stdClass $course The course object returned from the DB
- * @param stdClass $module The module object returned from the DB
- * @param stdClass $cm The course module instance returned from the DB
- */
-function folder_extend_navigation($navigation, $course, $module, $cm) {
-    /**
-     * This is currently just a stub so that it can be easily expanded upon.
-     * When expanding just remove this comment and the line below and then add
-     * you content.
-     */
-    $navigation->nodetype = navigation_node::NODETYPE_LEAF;
-}
-
 /**
  * Return a list of page types
  * @param string $pagetype current page type
diff --git a/mod/imscp/lib.php b/mod/imscp/lib.php
index d7ae5476597..1177ab9fc24 100644
--- a/mod/imscp/lib.php
+++ b/mod/imscp/lib.php
@@ -382,26 +382,6 @@ function imscp_pluginfile($course, $cm, $context, $filearea, $args, $forcedownlo
     }
 }
 
-/**
- * This function extends the global navigation for the site.
- * It is important to note that you should not rely on PAGE objects within this
- * body of code as there is no guarantee that during an AJAX request they are
- * available
- *
- * @param navigation_node $navigation The imscp node within the global navigation
- * @param stdClass $course The course object returned from the DB
- * @param stdClass $module The module object returned from the DB
- * @param stdClass $cm The course module instance returned from the DB
- */
-function imscp_extend_navigation($navigation, $course, $module, $cm) {
-    /**
-     * This is currently just a stub so that it can be easily expanded upon.
-     * When expanding just remove this comment and the line below and then add
-     * you content.
-     */
-    $navigation->nodetype = navigation_node::NODETYPE_LEAF;
-}
-
 /**
  * Return a list of page types
  * @param string $pagetype current page type
diff --git a/mod/lesson/lib.php b/mod/lesson/lib.php
index 4781fbc4930..b8bbf3d3e3c 100644
--- a/mod/lesson/lib.php
+++ b/mod/lesson/lib.php
@@ -789,26 +789,6 @@ function lesson_supports($feature) {
     }
 }
 
-/**
- * This function extends the global navigation for the site.
- * It is important to note that you should not rely on PAGE objects within this
- * body of code as there is no guarantee that during an AJAX request they are
- * available
- *
- * @param navigation_node $navigation The lesson node within the global navigation
- * @param stdClass $course The course object returned from the DB
- * @param stdClass $module The module object returned from the DB
- * @param stdClass $cm The course module instance returned from the DB
- */
-function lesson_extend_navigation($navigation, $course, $module, $cm) {
-    /**
-     * This is currently just a stub so  that it can be easily expanded upon.
-     * When expanding just remove this comment and the line below and then add
-     * you content.
-     */
-    $navigation->nodetype = navigation_node::NODETYPE_LEAF;
-}
-
 /**
  * This function extends the settings navigation block for the site.
  *
diff --git a/mod/page/lib.php b/mod/page/lib.php
index ef3d84b52f4..fdc3a58a078 100644
--- a/mod/page/lib.php
+++ b/mod/page/lib.php
@@ -411,27 +411,6 @@ function page_pluginfile($course, $cm, $context, $filearea, $args, $forcedownloa
     }
 }
 
-
-/**
- * This function extends the global navigation for the site.
- * It is important to note that you should not rely on PAGE objects within this
- * body of code as there is no guarantee that during an AJAX request they are
- * available
- *
- * @param navigation_node $navigation The page node within the global navigation
- * @param stdClass $course The course object returned from the DB
- * @param stdClass $module The module object returned from the DB
- * @param stdClass $cm The course module instance returned from the DB
- */
-function page_extend_navigation($navigation, $course, $module, $cm) {
-    /**
-     * This is currently just a stub so that it can be easily expanded upon.
-     * When expanding just remove this comment and the line below and then add
-     * you content.
-     */
-    $navigation->nodetype = navigation_node::NODETYPE_LEAF;
-}
-
 /**
  * Return a list of page types
  * @param string $pagetype current page type
diff --git a/mod/scorm/lib.php b/mod/scorm/lib.php
index 8ff14e6575f..081b6bf1830 100644
--- a/mod/scorm/lib.php
+++ b/mod/scorm/lib.php
@@ -959,26 +959,6 @@ function scorm_supports($feature) {
     }
 }
 
-/**
- * This function extends the global navigation for the site.
- * It is important to note that you should not rely on PAGE objects within this
- * body of code as there is no guarantee that during an AJAX request they are
- * available
- *
- * @param navigation_node $navigation The scorm node within the global navigation
- * @param stdClass $course The course object returned from the DB
- * @param stdClass $module The module object returned from the DB
- * @param stdClass $cm The course module instance returned from the DB
- */
-function scorm_extend_navigation($navigation, $course, $module, $cm) {
-    /**
-     * This is currently just a stub so that it can be easily expanded upon.
-     * When expanding just remove this comment and the line below and then add
-     * you content.
-     */
-    $navigation->nodetype = navigation_node::NODETYPE_LEAF;
-}
-
 /**
  * Get the filename for a temp log file
  *
diff --git a/mod/survey/lib.php b/mod/survey/lib.php
index 3af83e42cfb..2ce8548c5d0 100644
--- a/mod/survey/lib.php
+++ b/mod/survey/lib.php
@@ -813,26 +813,6 @@ function survey_supports($feature) {
     }
 }
 
-/**
- * This fucntion extends the global navigation for the site.
- * It is important to note that you should not rely on PAGE objects within this
- * body of code as there is no guarantee that during an AJAX request they are
- * available
- *
- * @param navigation_node $navigation The quiz node within the global navigation
- * @param stdClass $course The course object returned from the DB
- * @param stdClass $module The module object returned from the DB
- * @param stdClass $cm The course module instance returned from the DB
- */
-function survey_extend_navigation($navigation, $course, $module, $cm) {
-    /**
-     * This is currently just a stub so  that it can be easily expanded upon.
-     * When expanding just remove this comment and the line below and then add
-     * you content.
-     */
-    $navigation->nodetype = navigation_node::NODETYPE_LEAF;
-}
-
 /**
  * This function extends the settings navigation block for the site.
  *
diff --git a/mod/url/lib.php b/mod/url/lib.php
index 0e40ab18e92..197b75a9cfd 100644
--- a/mod/url/lib.php
+++ b/mod/url/lib.php
@@ -296,26 +296,6 @@ function url_get_coursemodule_info($coursemodule) {
     return $info;
 }
 
-/**
- * This function extends the global navigation for the site.
- * It is important to note that you should not rely on PAGE objects within this
- * body of code as there is no guarantee that during an AJAX request they are
- * available
- *
- * @param navigation_node $navigation The url node within the global navigation
- * @param stdClass $course The course object returned from the DB
- * @param stdClass $module The module object returned from the DB
- * @param stdClass $cm The course module instance returned from the DB
- */
-function url_extend_navigation($navigation, $course, $module, $cm) {
-    /**
-     * This is currently just a stub so that it can be easily expanded upon.
-     * When expanding just remove this comment and the line below and then add
-     * you content.
-     */
-    $navigation->nodetype = navigation_node::NODETYPE_LEAF;
-}
-
 /**
  * Return a list of page types
  * @param string $pagetype current page type