diff --git a/src/CourseBundle/Component/CourseCopy/CourseArchiver.php b/src/CourseBundle/Component/CourseCopy/CourseArchiver.php
index 20d9b7e5f1..641a156acc 100644
--- a/src/CourseBundle/Component/CourseCopy/CourseArchiver.php
+++ b/src/CourseBundle/Component/CourseCopy/CourseArchiver.php
@@ -282,84 +282,5 @@ class CourseArchiver
      */
     public static function readCourse($filename, $delete = false)
     {
-        self::cleanBackupDir();
-        // Create a temp directory
-        $tmp_dir_name = 'CourseArchiver_'.uniqid('');
-        $unzip_dir = self::getBackupDir().$tmp_dir_name;
-        $filePath = self::getBackupDir().$filename;
-
-        @mkdir($unzip_dir, api_get_permissions_for_new_directories(), true);
-        @copy(
-            $filePath,
-            $unzip_dir.'/backup.zip'
-        );
-
-        // unzip the archive
-        $zip = new PclZip($unzip_dir.'/backup.zip');
-        @chdir($unzip_dir);
-
-        $zip->extract(
-            PCLZIP_OPT_TEMP_FILE_ON,
-            PCLZIP_CB_PRE_EXTRACT,
-            'clean_up_files_in_zip'
-        );
-
-        // remove the archive-file
-        if ($delete) {
-            @unlink($filePath);
-        }
-
-        // read the course
-        if (!is_file('course_info.dat')) {
-            return new Course();
-        }
-
-        $fp = @fopen('course_info.dat', 'r');
-        $contents = @fread($fp, filesize('course_info.dat'));
-        @fclose($fp);
-
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Course', 'Course');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\Announcement', 'Announcement');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\Attendance', 'Attendance');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\CalendarEvent', 'CalendarEvent');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\CourseCopyLearnpath', 'CourseCopyLearnpath');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\CourseCopyTestCategory', 'CourseCopyTestCategory');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\CourseDescription', 'CourseDescription');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\CourseSession', 'CourseSession');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\Document', 'Document');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\Forum', 'Forum');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\ForumCategory', 'ForumCategory');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\ForumPost', 'ForumPost');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\ForumTopic', 'ForumTopic');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\Glossary', 'Glossary');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\GradeBookBackup', 'GradeBookBackup');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\Link', 'Link');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\LinkCategory', 'LinkCategory');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\Quiz', 'Quiz');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\QuizQuestion', 'QuizQuestion');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\QuizQuestionOption', 'QuizQuestionOption');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\ScormDocument', 'ScormDocument');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\Survey', 'Survey');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\SurveyInvitation', 'SurveyInvitation');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\SurveyQuestion', 'SurveyQuestion');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\Thematic', 'Thematic');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\ToolIntro', 'ToolIntro');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\Wiki', 'Wiki');
-        class_alias('Chamilo\CourseBundle\Component\CourseCopy\Resources\Work', 'Work');
-
-        /** @var Course $course */
-        $course = UnserializeApi::unserialize('course', base64_decode($contents));
-
-        if (!in_array(
-            get_class($course),
-            ['Course', 'Chamilo\CourseBundle\Component\CourseCopy\Course']
-        )
-        ) {
-            return new Course();
-        }
-
-        $course->backup_path = $unzip_dir;
-
-        return $course;
     }
 }
diff --git a/src/CourseBundle/DependencyInjection/ChamiloCourseExtension.php b/src/CourseBundle/DependencyInjection/ChamiloCourseExtension.php
index 480a0d83f7..70d1ece7a8 100644
--- a/src/CourseBundle/DependencyInjection/ChamiloCourseExtension.php
+++ b/src/CourseBundle/DependencyInjection/ChamiloCourseExtension.php
@@ -22,6 +22,5 @@ class ChamiloCourseExtension extends Extension
     {
         $loader = new Loader\YamlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
         $loader->load('services.yml');
-        //$loader->load('admin.yml');
     }
 }