Remove duplicate exception MDaccessDeniedException

exceptions/generic/MDaccessDeniedException.php

@@ -1,22 +0,0 @@
-<?PHP
-declare(strict_types = 1);
-
-/**
- * Exception thrown in case the main entity of a page (e.g. an object, an institution etc.)
- * are not set public.
- */
-class MDaccessDeniedException extends Exception {
-
-    /**
-     * Error message.
-     *
-     * @return string
-     */
-    public function errorMessage() {
-        //error message
-        $errorMsg = 'You have no permission to access this.';
-        return $errorMsg;
-
-    }
-
-}