removed unused strings

lang/en/enrol_apply.php

@@ -17,9 +17,6 @@ $string['confirmmailsubject'] = 'Confirm mail subject';
 $string['confirmmailcontent'] = 'Confirm mail content';
 $string['cancelmailsubject'] = 'Cancel mail subject';
 $string['cancelmailcontent'] = 'Cancel mail sontent';
-$string['mailaddress'] = 'Send mail address';
-$string['mailusername'] = 'Send mail username';
-$string['mailpassword'] = 'Send mail password';
 $string['confirmmailcontent_desc'] = 'Please use special marks designated email content replaced.<br>{firstname}:Registration name; {content}:Course name';
 $string['cancelmailcontent_desc'] = 'Please use special marks designated email content replaced.<br>{firstname}:Registration name; {content}:Course name';
 
@@ -41,13 +38,10 @@ $string['apply:manage'] = 'Manage apply enrolment';
 $string['apply:unenrol'] = 'Cancel users from course';
 $string['apply:unenrolapply'] = 'Cancel self from the course';
  
-// Description of your plugin. Shown on the plugin's configuration screen.
-$string['description'] = '';
 $string['notification'] = '<b>Enrollment Application successfully sent</b>. <br/><br/>You will be informed by email as soon as your enrollment has been confirmed. If you want to enroll to other courses, please click "course catalogue" in the top menu.';
 
 $string['sendmailtoteacher'] = 'Send email notification to teachers';
 $string['mailtoteacher_suject'] = 'New Enrollment request!';
-$string['setting_edit'] = 'Edit';
 $string['editdescription'] = 'Textarea description';
 $string['applymanage'] = 'Manage enrolment applications';
 ?>