diff --git a/main/gradebook/lib/be/abstractlink.class.php b/main/gradebook/lib/be/abstractlink.class.php
index 5a7087e147..8453ea0fbc 100755
--- a/main/gradebook/lib/be/abstractlink.class.php
+++ b/main/gradebook/lib/be/abstractlink.class.php
@@ -557,12 +557,6 @@ abstract class AbstractLink implements GradebookItem
         return 'link';
     }
 
-    /* Seems to be not used anywhere */
-    public function get_not_created_links()
-    {
-        return null;
-    }
-
     public function get_all_links()
     {
         return null;
diff --git a/main/gradebook/lib/be/attendancelink.class.php b/main/gradebook/lib/be/attendancelink.class.php
index cb7ffa1b6e..c9615a32db 100755
--- a/main/gradebook/lib/be/attendancelink.class.php
+++ b/main/gradebook/lib/be/attendancelink.class.php
@@ -38,46 +38,6 @@ class AttendanceLink extends AbstractLink
         return false;
     }
 
-    /**
-     * Generate an array of attendances that a teacher hasn't created a link for.
-     *
-     * @return array 2-dimensional array - every element contains 2 subelements (id, name)
-     *
-     * @todo seems to be depracated
-     */
-    public function get_not_created_links()
-    {
-        return false;
-        if (empty($this->course_code)) {
-            die('Error in get_not_created_links() : course code not set');
-        }
-        $tbl_grade_links = Database::get_main_table(TABLE_MAIN_GRADEBOOK_LINK);
-
-        $sql = 'SELECT att.id, att.name, att.attendance_qualify_title
-                FROM '.$this->get_attendance_table().' att
-                WHERE
-                    att.c_id = '.$this->course_id.' AND
-                    att.id NOT IN (
-                        SELECT ref_id FROM '.$tbl_grade_links.'
-                        WHERE
-                            type = '.LINK_ATTENDANCE.' AND
-                            course_code = "'.Database::escape_string($this->get_course_code()).'"
-                    )
-                AND att.session_id='.api_get_session_id().'';
-        $result = Database::query($sql);
-
-        $cats = [];
-        while ($data = Database::fetch_array($result)) {
-            if (isset($data['attendance_qualify_title']) && $data['attendance_qualify_title'] != '') {
-                $cats[] = [$data['id'], $data['attendance_qualify_title']];
-            } else {
-                $cats[] = [$data['id'], $data['name']];
-            }
-        }
-
-        return $cats;
-    }
-
     /**
      * Generate an array of all attendances available.
      *
@@ -86,7 +46,7 @@ class AttendanceLink extends AbstractLink
     public function get_all_links()
     {
         if (empty($this->course_code)) {
-            die('Error in get_not_created_links() : course code not set');
+            return [];
         }
         $tbl_attendance = $this->get_attendance_table();
         $session_id = api_get_session_id();
diff --git a/main/gradebook/lib/be/category.class.php b/main/gradebook/lib/be/category.class.php
index 76f2eb9623..e81491c487 100755
--- a/main/gradebook/lib/be/category.class.php
+++ b/main/gradebook/lib/be/category.class.php
@@ -1588,6 +1588,7 @@ class Category implements GradebookItem
                 $this->id,
                 api_is_allowed_to_edit() ? null : 1
             );
+
             /** @var Category $cat */
             foreach ($cats as $cat) {
                 if ($cat->hasEvaluationsWithStudentResults($studentId)) {
@@ -1775,7 +1776,6 @@ class Category implements GradebookItem
                     $this->id,
                     api_is_allowed_to_edit() ? null : 1
                 );
-
             }
         } else {
             // All students
diff --git a/main/gradebook/lib/be/dropboxlink.class.php b/main/gradebook/lib/be/dropboxlink.class.php
index 37190b087c..5767cccdd1 100755
--- a/main/gradebook/lib/be/dropboxlink.class.php
+++ b/main/gradebook/lib/be/dropboxlink.class.php
@@ -31,9 +31,11 @@ class DropboxLink extends EvalLink
         // with the same title as the evaluation name
 
         $eval = $this->get_evaluation();
-        $sql = 'SELECT filename FROM '.$this->get_dropbox_table()
-            .' WHERE c_id = '.$this->course_id.' AND uploader_id = '.intval($stud_id)
-            ." AND title = '".Database::escape_string($eval->get_name())."'";
+        $sql = 'SELECT filename FROM '.$this->get_dropbox_table().' 
+                WHERE 
+                    c_id = '.$this->course_id.' AND 
+                    uploader_id = '.intval($stud_id)." AND 
+                    title = '".Database::escape_string($eval->get_name())."'";
 
         $result = Database::query($sql);
         if ($fileurl = Database::fetch_row($result)) {
diff --git a/main/gradebook/lib/be/forumthreadlink.class.php b/main/gradebook/lib/be/forumthreadlink.class.php
index 5a72fe6a27..1a2fba1605 100755
--- a/main/gradebook/lib/be/forumthreadlink.class.php
+++ b/main/gradebook/lib/be/forumthreadlink.class.php
@@ -152,9 +152,7 @@ class ForumThreadLink extends AbstractLink
     {
         require_once api_get_path(SYS_CODE_PATH).'forum/forumfunction.inc.php';
         $threadInfo = get_thread_information('', $this->get_ref_id());
-
         $thread_qualify = Database::get_course_table(TABLE_FORUM_THREAD_QUALIFY);
-
         $sessionId = $this->get_session_id();
         $sessionCondition = api_get_session_condition(
             $sessionId,
diff --git a/main/gradebook/lib/be/learnpathlink.class.php b/main/gradebook/lib/be/learnpathlink.class.php
index 51588846fa..24ef7872ae 100755
--- a/main/gradebook/lib/be/learnpathlink.class.php
+++ b/main/gradebook/lib/be/learnpathlink.class.php
@@ -24,37 +24,6 @@ class LearnpathLink extends AbstractLink
         $this->set_type(LINK_LEARNPATH);
     }
 
-    /**
-     * Generate an array of learnpaths that a teacher hasn't created a link for.
-     *
-     * @return array 2-dimensional array - every element contains 2 subelements (id, name)
-     */
-    public function get_not_created_links()
-    {
-        return false;
-        if (empty($this->course_code)) {
-            die('Error in get_not_created_links() : course code not set');
-        }
-
-        $tbl_grade_links = Database::get_main_table(TABLE_MAIN_GRADEBOOK_LINK);
-
-        $sql = 'SELECT id, name FROM '.$this->get_learnpath_table().' lp
-				WHERE c_id = '.$this->course_id.' AND id NOT IN '
-            .' (SELECT ref_id FROM '.$tbl_grade_links
-            .' WHERE type = '.LINK_LEARNPATH
-            ." AND course_code = '".$this->get_course_code()."'"
-            .') AND lp.session_id='.api_get_session_id().'';
-
-        $result = Database::query($sql);
-
-        $cats = [];
-        while ($data = Database::fetch_array($result)) {
-            $cats[] = [$data['id'], $data['name']];
-        }
-
-        return $cats;
-    }
-
     /**
      * Generate an array of all learnpaths available.
      *
@@ -63,7 +32,7 @@ class LearnpathLink extends AbstractLink
     public function get_all_links()
     {
         if (empty($this->course_code)) {
-            die('Error in get_not_created_links() : course code not set');
+            return [];
         }
 
         $session_id = api_get_session_id();
diff --git a/main/gradebook/lib/be/studentpublicationlink.class.php b/main/gradebook/lib/be/studentpublicationlink.class.php
index 597fa04840..e519a4e998 100755
--- a/main/gradebook/lib/be/studentpublicationlink.class.php
+++ b/main/gradebook/lib/be/studentpublicationlink.class.php
@@ -71,36 +71,6 @@ class StudentPublicationLink extends AbstractLink
         return false;
     }
 
-    /**
-     * Generate an array of exercises that a teacher hasn't created a link for.
-     *
-     * @return array 2-dimensional array - every element contains 2 subelements (id, name)
-     */
-    public function get_not_created_links()
-    {
-        return false;
-        if (empty($this->course_code)) {
-            die('Error in get_not_created_links() : course code not set');
-        }
-        $tbl_grade_links = Database::get_main_table(TABLE_MAIN_GRADEBOOK_LINK);
-
-        $sql = 'SELECT id, url from '.$this->get_studpub_table()
-            .' pup WHERE c_id = '.$this->course_id.' AND has_properties != '."''".' AND id NOT IN'
-            .' (SELECT ref_id FROM '.$tbl_grade_links
-            .' WHERE type = '.LINK_STUDENTPUBLICATION
-            ." AND course_code = '".Database::escape_string($this->get_course_code())."'"
-            .') AND pub.session_id='.api_get_session_id().'';
-
-        $result = Database::query($sql);
-
-        $cats = [];
-        while ($data = Database::fetch_array($result)) {
-            $cats[] = [$data['id'], $data['url']];
-        }
-
-        return $cats;
-    }
-
     /**
      * Generate an array of all exercises available.
      *
@@ -109,7 +79,7 @@ class StudentPublicationLink extends AbstractLink
     public function get_all_links()
     {
         if (empty($this->course_code)) {
-            die('Error in get_not_created_links() : course code not set');
+            return [];
         }
         $em = Database::getManager();
         $session = $em->find('ChamiloCoreBundle:Session', api_get_session_id());
diff --git a/main/gradebook/lib/be/surveylink.class.php b/main/gradebook/lib/be/surveylink.class.php
index 12d4153771..737314b8f5 100755
--- a/main/gradebook/lib/be/surveylink.class.php
+++ b/main/gradebook/lib/be/surveylink.class.php
@@ -93,42 +93,6 @@ class SurveyLink extends AbstractLink
         return isset($links) ? $links : null;
     }
 
-    /**
-     * Generates an array of surveys that a teacher hasn't created a link for.
-     *
-     * @return array 2-dimensional array - every element contains 2 subelements (id, name)
-     */
-    public function get_not_created_links()
-    {
-        if (empty($this->course_code)) {
-            die('Error in get_not_created_links() : course code not set');
-        }
-        $tbl_grade_links = Database::get_main_table(TABLE_MAIN_GRADEBOOK_LINK);
-
-        $sql = 'SELECT survey_id, title, code
-                FROM '.$this->get_survey_table().' AS srv
-                WHERE survey_id NOT IN
-                    (
-                    SELECT ref_id FROM '.$tbl_grade_links.'
-                    WHERE
-                        type = '.LINK_SURVEY.' AND
-                        course_code = "'.$this->get_course_code().'"
-                    )
-                    AND srv.session_id = '.api_get_session_id();
-
-        $result = Database::query($sql);
-
-        $links = [];
-        while ($data = Database::fetch_array($result)) {
-            $links[] = [
-                $data['survey_id'],
-                api_trunc_str($data['code'].': '.self::html_to_text($data['title']), 80),
-            ];
-        }
-
-        return $links;
-    }
-
     /**
      * Has anyone done this survey yet?
      * Implementation of the AbstractLink class, mainly used dynamically in gradebook/lib/fe.