diff --git a/20.test/partials/textbook.en.md b/20.test/partials/textbook.en.md
deleted file mode 100644
index 59e6b3c8e..000000000
--- a/20.test/partials/textbook.en.md
+++ /dev/null
@@ -1,4 +0,0 @@
-```php
-// Tutorial about PHP
-$course = "Welcome to the PHP course!";
-```