diff --git a/classes/debug.php b/classes/debug.php
deleted file mode 100644
index 268e661..0000000
--- a/classes/debug.php
+++ /dev/null
@@ -1,73 +0,0 @@
-<?php
-// This file is part of the Studyplan plugin for Moodle
-//
-// Moodle is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// Moodle is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with Moodle.  If not, see <https://www.gnu.org/licenses/>.
-
-/**
- * Ease of debugging tools
- * @package    local_treestudyplan
- * @copyright  2023 P.M. Kuipers
- * @license    https://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
-namespace local_treestudyplan;
-
-use JsonException;
-
-/**
- * Crude tool to aid in debugging
- */
-class debug {
-    /**
-     * Dump an object in json format to debug log
-     * @param mixed $object Object to dump
-     * @param string $filename File to write to
-     * @return any The object
-     */
-    public static function &dump(&$object, $filename="/tmp/debug.log") {
-
-        try {
-            $f = fopen($filename, "a+");
-            try {
-                $json = \json_encode($object, JSON_PRETTY_PRINT | JSON_THROW_ON_ERROR );
-                fwrite($f, $json."\n");
-            } catch (JsonException $x) {
-                fwrite($f, "Error processing json: ". $x->getMessage()."\n");
-            }
-        } catch (\Exception $x) {
-            $f = null;
-
-        } finally {
-            fclose($f);
-        }
-        return $object;
-    }
-
-    /**
-     * Write text to debug log file
-     * @param string $text Text to write
-     * @param string $filename File to write to
-     * @return any The object
-     */
-    public static function write($text, $filename="/tmp/debug.log") {
-        try {
-            $f = fopen($filename, "a+");
-            fwrite($f, $text."\n");
-        } catch (\Exception $x) {
-            $f = null;
-        } finally {
-            fclose($f);
-        }
-    }
-
-}
diff --git a/classes/form/studyplan_editform.php b/classes/form/studyplan_editform.php
index 24a55a0..2fb6ca7 100644
--- a/classes/form/studyplan_editform.php
+++ b/classes/form/studyplan_editform.php
@@ -399,7 +399,6 @@ class studyplan_editform extends formbase {
            so we return it in a consistent way
         */
         $response = studyplanservice::clean_returnvalue(studyplan::simple_structure(), $plan->simple_model());
-        debug::dump($response);
         return $response;
     }
 }
diff --git a/classes/studyplan.php b/classes/studyplan.php
index 9af12df..c492593 100644
--- a/classes/studyplan.php
+++ b/classes/studyplan.php
@@ -962,7 +962,6 @@ class studyplan {
                     ];
                     // Copy existing file into new file.
                     $fs->create_file_from_storedfile($fileinfo, $file);
-                    debug::write("Copied {$area}::{$path}{$filename} from {$this->id} to {$newplan->id()}");
                 }
             }
         }