Update docs

Author: jwodder

docs/source/ref/urls.rst

@@ -36,13 +36,9 @@ used otherwise.
     a collection of assets whose paths match the glob pattern ``path``, and
     `parse_dandi_url()` will convert the URL to an `AssetGlobURL`.
 
-  - If the ``glob``/``--path-type glob`` option is not in effect and ``path``
-    ends with a trailing slash, the URL refers to an asset folder by path, and
-    `parse_dandi_url()` will convert the URL to an `AssetFolderURL`.
-
-  - If the ``glob``/``--path-type glob`` option is not in effect and ``path``
-    does not end with a trailing slash, the URL refers to a single asset by
-    path, and `parse_dandi_url()` will convert the URL to an `AssetItemURL`.
+  - If the ``glob``/``--path-type glob`` option is not in effect, the URL
+    refers to an asset folder by path, and `parse_dandi_url()` will convert the
+    URL to an `AssetFolderURL`.
 
 - :samp:`https://{server}[/api]/dandisets/{dandiset-id}[/versions[/{version}]]`
   — Refers to a Dandiset.  `parse_dandi_url()` converts this format to a