Fixing addTagFormDeleteLink function

`removeFormButton.classList` looked useless, so I deleted it.

Author: ThomasLandauer

form/form_collections.rst

@@ -545,9 +545,8 @@ The ``addTagFormDeleteLink()`` function will look something like this:
 .. code-block:: javascript
 
     const addTagFormDeleteLink = (element) => {
-        const removeFormButton = document.createElement('button')
-        removeFormButton.classList
-        removeFormButton.innerText = 'Delete this tag'
+        const removeFormButton = document.createElement('button');
+        removeFormButton.innerText = 'Delete this tag';
 
         element.append(removeFormButton);