remove invalid web feature tags (#6715)

tutorials/export/feature_tags.rst

@@ -44,11 +44,6 @@ Here is a list of most feature tags in Godot. Keep in mind they are **case-sensi
 +-----------------+----------------------------------------------------------+
 | **bsd**         | Running on \*BSD                                         |
 +-----------------+----------------------------------------------------------+
-| **html5**       | Running on HTML5                                         |
-+-----------------+----------------------------------------------------------+
-| **javascript**  | :ref:`JavaScript singleton <doc_javascript_eval>` is     |
-|                 | available                                                |
-+-----------------+----------------------------------------------------------+
 | **linux**       | Running on Linux                                         |
 +-----------------+----------------------------------------------------------+
 | **macos**       | Running on macOS                                         |