[torque] Cleanup uses of torque generated class definitions.

Bug: v8:7793
Change-Id: I5e682ba555d79be533e325bed12e87aabf90b311
Reviewed-on: https://chromium-review.googlesource.com/c/1437989Reviewed-by: Daniel Clifford <danno@chromium.org>
Commit-Queue: Peter Wong <peter.wm.wong@gmail.com>
Cr-Commit-Position: refs/heads/master@{#59123}

src/objects/arguments.h

@@ -30,14 +30,9 @@ class JSArgumentsObject : public JSObject {
 // mode already. Only use the below layout with the specific initial maps.
 class JSArgumentsObjectWithLength : public JSArgumentsObject {
  public:
-// Layout description.
-#define JS_ARGUMENTS_OBJECT_WITH_LENGTH_FIELDS(V) \
-  V(kLengthOffset, kTaggedSize)                   \
-  V(kSize, 0)
-
+  // Layout description.
   DEFINE_FIELD_OFFSET_CONSTANTS(JSObject::kHeaderSize,
                                 JSARGUMENTS_OBJECT_WITH_LENGTH_FIELDS)
-#undef JS_ARGUMENTS_OBJECT_WITH_LENGTH_FIELDS
 
   // Indices of in-object properties.
   static const int kLengthIndex = 0;

src/objects/js-array.h

@@ -106,7 +106,6 @@ class JSArray : public JSObject {
   static const int kPreallocatedArrayElements = 4;
 
   DEFINE_FIELD_OFFSET_CONSTANTS(JSObject::kHeaderSize, JSARRAY_FIELDS)
-#undef JS_ARRAY_FIELDS
 
   static const int kLengthDescriptorIndex = 0;