mod/quiz: Revert commit which added the "go back to course" link

lang/en_utf8/quiz.php

@@ -221,7 +221,6 @@ $string['giftnonumericalanswers'] = 'No answers found for numerical question';
 $string['giftnovalidquestion'] = 'No valid question found';
 $string['giftqtypenotset'] = 'Question type is not set';
 $string['giftrightbraceerror'] = 'Could not find a }';
-$string['gobacktocourse'] = 'Click here to go back to the course';
 $string['grade'] = 'Grade';
 $string['gradeall'] = 'Grade All';
 $string['gradeaverage'] = 'Average grade';

mod/quiz/review.php

@@ -224,9 +224,6 @@
         include('attempt_close_js.php');
     }
 
-    // Button to go back to the course page
-    echo '<p align="center"><a href="'.$CFG->wwwroot.'/course/view.php?id='.$quiz->course.'">'.get_string('gobacktocourse', 'quiz').'</a></p>';
-
 /// Print the navigation panel if required
     $numpages = quiz_number_of_pages($attempt->layout);
     if ($numpages > 1 and !$showall) {