diff --git a/mod/book/edit.php b/mod/book/edit.php
index 0af2b99f2d6..50088adf8d3 100644
--- a/mod/book/edit.php
+++ b/mod/book/edit.php
@@ -115,10 +115,6 @@ $PAGE->set_heading(format_string($course->fullname));
 echo $OUTPUT->header();
 echo $OUTPUT->heading(get_string('editingchapter', 'mod_book'));
 
-if (debugging()) {
-    echo $OUTPUT->box($OUTPUT->notification(get_string('missingfilemanagement', 'mod_book', html_writer::link('http://tracker.moodle.org/browse/MDL-28019', 'MDL-28019'))));
-}
-
 $mform->display();
 
 echo $OUTPUT->footer();
diff --git a/mod/book/lang/en/book.php b/mod/book/lang/en/book.php
index facfdb95498..f737bda401f 100644
--- a/mod/book/lang/en/book.php
+++ b/mod/book/lang/en/book.php
@@ -109,6 +109,5 @@ $string['errorchapter'] = 'Error reading book chapter.';
 
 $string['page-mod-book-x'] = 'Any book module page';
 
-$string['missingfilemanagement'] = 'Dear users of Book module, I supposed you have already notised that it is not possible to delete or manage files used in Book chapters. Please vote in {$a} to get this fixed, thanks. Petr Škoda';
 $string['subplugintype_booktool'] = 'Book tool';
 $string['subplugintype_booktool_plural'] = 'Book tools';
diff --git a/mod/book/lib.php b/mod/book/lib.php
index cc15f1d2b53..80d21160ca3 100644
--- a/mod/book/lib.php
+++ b/mod/book/lib.php
@@ -297,10 +297,6 @@ function book_extend_settings_navigation(settings_navigation $settingsnav, navig
         return;
     }
 
-    if (empty($PAGE->cm->context)) {
-        $PAGE->cm->context = get_context_instance(CONTEXT_MODULE, $PAGE->cm->instance);
-    }
-
     $plugins = get_plugin_list('booktool');
     foreach ($plugins as $plugin => $dir) {
         if (file_exists("$dir/lib.php")) {
diff --git a/mod/book/tool/exportimscp/lib.php b/mod/book/tool/exportimscp/lib.php
index d655c31963e..f807c13d513 100644
--- a/mod/book/tool/exportimscp/lib.php
+++ b/mod/book/tool/exportimscp/lib.php
@@ -37,13 +37,9 @@ function booktool_exportimscp_extend_settings_navigation(settings_navigation $se
         return;
     }
 
-    if (empty($PAGE->cm->context)) {
-        $PAGE->cm->context = get_context_instance(CONTEXT_MODULE, $PAGE->cm->instance);
-    }
-
     if (has_capability('booktool/exportimscp:export', $PAGE->cm->context)) {
         $url = new moodle_url('/mod/book/tool/exportimscp/index.php', array('id'=>$PAGE->cm->id));
         $icon = new pix_icon('generate', '', 'booktool_exportimscp', array('class'=>'icon'));
         $node->add(get_string('generateimscp', 'booktool_exportimscp'), $url, navigation_node::TYPE_SETTING, null, null, $icon);
     }
-}
\ No newline at end of file
+}
diff --git a/mod/book/tool/importhtml/lib.php b/mod/book/tool/importhtml/lib.php
index 1bb81f555cb..833324070ee 100644
--- a/mod/book/tool/importhtml/lib.php
+++ b/mod/book/tool/importhtml/lib.php
@@ -37,12 +37,8 @@ function booktool_importhtml_extend_settings_navigation(settings_navigation $set
          return;
      }
 
-     if (empty($PAGE->cm->context)) {
-         $PAGE->cm->context = get_context_instance(CONTEXT_MODULE, $PAGE->cm->instance);
-     }
-
      if (has_capability('booktool/importhtml:import', $PAGE->cm->context)) {
          $url = new moodle_url('/mod/book/tool/importhtml/index.php', array('id'=>$PAGE->cm->id));
          $node->add(get_string('import', 'booktool_importhtml'), $url, navigation_node::TYPE_SETTING, null, null, null);
      }
-}
\ No newline at end of file
+}
diff --git a/mod/book/tool/print/lib.php b/mod/book/tool/print/lib.php
index 5a2e92c27c9..8172c07be7e 100644
--- a/mod/book/tool/print/lib.php
+++ b/mod/book/tool/print/lib.php
@@ -37,10 +37,6 @@ function booktool_print_extend_settings_navigation(settings_navigation $settings
         return;
     }
 
-    if (empty($PAGE->cm->context)) {
-        $PAGE->cm->context = get_context_instance(CONTEXT_MODULE, $PAGE->cm->instance);
-    }
-
     $params = $PAGE->url->params();
 
     if (empty($params['id']) or empty($params['chapterid'])) {