Rip out most of our outdated modules implementation.

src/objects-debug.cc

Index: src/objects-debug.cc
diff --git a/src/objects-debug.cc b/src/objects-debug.cc
index d3d13d4586873adcb22b05ee8560ee2133bafd14..f53a0349e211f679885e711a899bb99cf3bb593a 100644
--- a/src/objects-debug.cc
+++ b/src/objects-debug.cc
@@ -110,9 +110,6 @@ void HeapObject::HeapObjectVerify() {
     case JS_GENERATOR_OBJECT_TYPE:
       JSGeneratorObject::cast(this)->JSGeneratorObjectVerify();
       break;
-    case JS_MODULE_TYPE:
-      JSModule::cast(this)->JSModuleVerify();
-      break;
     case JS_VALUE_TYPE:
       JSValue::cast(this)->JSValueVerify();
       break;
@@ -432,14 +429,6 @@ void JSGeneratorObject::JSGeneratorObjectVerify() {
 }
 
 
-void JSModule::JSModuleVerify() {
-  VerifyObjectField(kContextOffset);
-  VerifyObjectField(kScopeInfoOffset);
-  CHECK(context()->IsUndefined(GetIsolate()) ||
-        Context::cast(context())->IsModuleContext());
-}
-
-
 void JSValue::JSValueVerify() {
   Object* v = value();
   if (v->IsHeapObject()) {