Non-functional. Rationalizations enabling future generalizations:

- Use much simpler method to update implicit array sizes.
  The previous overly complicated method was error prone.
- Rationalize all use of unsized arrays.
- Combine decorations when generating SPIR-V, to simplify
  adding extensions.

hlsl/hlslParseHelper.h

@@ -164,8 +164,6 @@ public:
     void wrapupSwitchSubsequence(TIntermAggregate* statements, TIntermNode* branchNode);
     TIntermNode* addSwitch(const TSourceLoc&, TIntermTyped* expression, TIntermAggregate* body, const TAttributes&);
 
-    void updateImplicitArraySize(const TSourceLoc&, TIntermNode*, int index);
-
     void nestLooping()       { ++loopNestingLevel; }
     void unnestLooping()     { --loopNestingLevel; }
     void nestAnnotations()   { ++annotationNestingLevel; }