static immutable AAs documentation

[Luís Marques]

The documentation for AAs gives out this example 
(<https://dlang.org/spec/hash-map.html#static_initialization>):

     immutable long[string] aa = [
       "foo": 5,
       "bar": 10,
       "baz": 2000
     ];

     unittest
     {
         assert(aa["foo"] == 5);
         assert(aa["bar"] == 10);
         assert(aa["baz"] == 2000);
     }

This isn't actually supported:

<https://issues.dlang.org/show_bug.cgi?id=6238>
<https://issues.dlang.org/show_bug.cgi?id=1578>

Given how long this limitation has persisted, wouldn't it be best 
to remove that section from the documentation?