Remove ExternalArray, derived types, and element kinds

src/compiler/access-builder.cc

Index: src/compiler/access-builder.cc
diff --git a/src/compiler/access-builder.cc b/src/compiler/access-builder.cc
index 24701634748a363747cff0d0cc715f386bd723fe..b54982f4c9288e06e6da4af72a97e050d1444851 100644
--- a/src/compiler/access-builder.cc
+++ b/src/compiler/access-builder.cc
@@ -81,14 +81,6 @@ FieldAccess AccessBuilder::ForFixedArrayLength() {
 
 
 // static
-FieldAccess AccessBuilder::ForExternalArrayPointer() {
-  FieldAccess access = {kTaggedBase, ExternalArray::kExternalPointerOffset,
-                        MaybeHandle<Name>(), Type::UntaggedPointer(), kMachPtr};
-  return access;
-}
-
-
-// static
 FieldAccess AccessBuilder::ForDescriptorArrayEnumCache() {
   FieldAccess access = {kTaggedBase, DescriptorArray::kEnumCacheOffset,
                         Handle<Name>(), Type::TaggedPointer(), kMachAnyTagged};