[WHLSL] array typedef test causes us to compile a metal program with an error in it

[Saam Barati]

```
        typedef ArrayTypedef = int[2];
        int foo()
        {
            ArrayTypedef arrayTypedef;
            return arrayTypedef[0];
        }
```
\
program_source:549:24: error: cannot initialize a member subobject of type 'type1 *' (aka 'int *') with an lvalue of type 'type135 *' (aka 'array<int, 2> *')
type143 variable10 = { variable8, 1 };
                       ^~~~~~~~~

[Myles C. Maxfield]

WHLSL is no longer relevant.