Remove SmartAllocator support from Variant @override-unit-failures

It looks like this is all it takes now.  I couldn't find any
of the old .inc file stuff; I guess it went away at some point.

hphp/runtime/base/type_variant.cpp

@@ -49,8 +49,6 @@ static void unserializeProp(VariableUnserializer *uns,
                             CStrRef context, CStrRef realKey,
                             int nProp) NEVER_INLINE;
 
-IMPLEMENT_SMART_ALLOCATION_HOT(Variant);
-
 ///////////////////////////////////////////////////////////////////////////////
 // static strings
 

hphp/runtime/base/type_variant.h

@@ -726,11 +726,10 @@ class Variant : private TypedValue {
    */
   Variant share(bool save) const;
 
-  /**
-   * Memory allocator methods.
+  /*
+   * Print information about a variant to stdout.  For debugging
+   * purposes.
    */
-  DECLARE_SMART_ALLOCATION(Variant);
-
   void dump() const;
 
   /**