MDL-21695 Strings and helps cleanup

course/moodleform_mod.php

@@ -212,8 +212,6 @@ abstract class moodleform_mod extends moodleform {
                             get_string('completedwarning', 'completion'),
                             get_string('completedwarningtext', 'completion', $completedcount)),
                         'unlockcompletion');
-                    $mform->addHelpButton('completedwarning', 'completionlocked', 'completion');
-
                     $freeze = true;
                 }
             }

lang/en/help/advancedsettings.html

@@ -1,8 +0,0 @@
-<h1>Advanced settings</h1>
-
-<p>Selecting any of these check boxes will cause the corresponding options 
-   to be hidden from teachers by default.</p>
-
-<p>However, they will still be able to access these "Advanced settings" 
-   using a button on the editing page for this module.
-</p>

lang/en/moodle.php

@@ -902,7 +902,6 @@ $string['checknone'] = 'Check none';
 $string['childcoursenotfound'] = 'Child course not found!';
 $string['childcourses'] = 'Child courses';
 $string['choose'] = 'Choose';
-$string['chooseauthmethod'] = 'Choose authentication plugin';
 $string['choosecourse'] = 'Choose a course';
 $string['choosedots'] = 'Choose...';
 $string['chooseenrolmethod'] = 'Choose enrolment plugin';