diff --git a/backup/moodle2/restore_attendance_stepslib.php b/backup/moodle2/restore_attendance_stepslib.php
index b177fb5..f8c0dae 100644
--- a/backup/moodle2/restore_attendance_stepslib.php
+++ b/backup/moodle2/restore_attendance_stepslib.php
@@ -75,7 +75,6 @@ class restore_attendance_activity_structure_step extends restore_activity_struct
         global $DB;
 
         $data = (object)$data;
-        $oldid = $data->id;
         $data->course = $this->get_courseid();
 
         // Insert the attendance record.
@@ -132,7 +131,6 @@ class restore_attendance_activity_structure_step extends restore_activity_struct
         global $DB;
 
         $data = (object)$data;
-        $oldid = $data->id;
 
         $data->sessionid = $this->get_mappingid('attendance_session', $data->sessionid);
         $data->studentid = $this->get_mappingid('user', $data->studentid);
@@ -145,7 +143,7 @@ class restore_attendance_activity_structure_step extends restore_activity_struct
         $data->timetaken = $this->apply_date_offset($data->timetaken);
         $data->takenby = $this->get_mappingid('user', $data->takenby);
 
-        $newitemid = $DB->insert_record('attendance_log', $data);
+        $DB->insert_record('attendance_log', $data);
     }
 
     /**
diff --git a/duration_form.php b/duration_form.php
index 3e067d5..347c588 100644
--- a/duration_form.php
+++ b/duration_form.php
@@ -39,12 +39,9 @@ class mod_attendance_duration_form extends moodleform {
      */
     public function definition() {
 
-        global $CFG;
         $mform    =& $this->_form;
 
-        $course        = $this->_customdata['course'];
         $cm            = $this->_customdata['cm'];
-        $modcontext    = $this->_customdata['modcontext'];
         $ids           = $this->_customdata['ids'];
 
         $mform->addElement('header', 'general', get_string('changeduration', 'attendance'));
diff --git a/lib.php b/lib.php
index 3222181..432ae12 100644
--- a/lib.php
+++ b/lib.php
@@ -253,13 +253,6 @@ function attendance_user_complete($course, $user, $mod, $attendance) {
         echo construct_full_user_stat_html_table($attendance, $course, $user, $mod);
     }
 }
-function attendance_print_recent_activity($course, $isteacher, $timestart) {
-    return false;
-}
-
-function attendance_cron () {
-    return true;
-}
 
 function attendance_update_grades($attendance, $userid=0, $nullifnone=true) {
     // We need this function to exist so that quick editing of module name is passed to gradebook.
@@ -375,7 +368,7 @@ function attendance_scale_used_anywhere($scaleid) {
  * @return bool false if file not found, does not return if found - justsend the file
  */
 function attendance_pluginfile($course, $cm, $context, $filearea, $args, $forcedownload) {
-    global $CFG, $DB;
+    global $DB;
 
     if ($context->contextlevel != CONTEXT_MODULE) {
         return false;
@@ -383,7 +376,7 @@ function attendance_pluginfile($course, $cm, $context, $filearea, $args, $forced
 
     require_login($course, false, $cm);
 
-    if (!$att = $DB->get_record('attendance', array('id' => $cm->instance))) {
+    if (!$DB->record_exists('attendance', array('id' => $cm->instance))) {
         return false;
     }
 
@@ -394,7 +387,7 @@ function attendance_pluginfile($course, $cm, $context, $filearea, $args, $forced
     }
 
     $sessid = (int)array_shift($args);
-    if (!$sess = $DB->get_record('attendance_sessions', array('id' => $sessid))) {
+    if (!$DB->record_exists('attendance_sessions', array('id' => $sessid))) {
         return false;
     }