Update c_sharp_exports.rst to remove note about typed dictionary support

That note appears to be obsolete

tutorials/scripting/c_sharp/c_sharp_exports.rst

@@ -580,12 +580,6 @@ Exporting Godot dictionaries
 Using the generic ``Godot.Collections.Dictionary<TKey, TValue>`` allows specifying
 the types of the key and value elements of the dictionary.
 
-.. note::
-
-    Typed dictionaries are currently unsupported in the Godot editor, so
-    the Inspector will not restrict the types that can be assigned, potentially
-    resulting in runtime exceptions.
-
 .. code-block:: csharp
 
     [Export]