Revert of [d8] Fix LeakSanitizer failures on the bots due to...

Revert of [d8] Fix LeakSanitizer failures on the bots due to ModuleEmbedderData (patchset #2 id:20001 of https://codereview.chromium.org/2403303002/ )

Reason for revert:
Still failing on auto-roll fyi bot

Original issue's description:
> [d8] Fix LeakSanitizer failures on the bots due to ModuleEmbedderData
>
> BUG=v8:1569
> TBR=jochen@chromium.org
>
> Committed: https://crrev.com/cd6f1c98f989ef991da3ff465f183c1caa070918
> Cr-Commit-Position: refs/heads/master@{#40143}

TBR=jochen@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:1569

Review-Url: https://codereview.chromium.org/2403103004
Cr-Commit-Position: refs/heads/master@{#40144}

src/d8.cc

@@ -725,12 +725,8 @@ PerIsolateData::RealmScope::RealmScope(PerIsolateData* data) : data_(data) {
 
 PerIsolateData::RealmScope::~RealmScope() {
   // Drop realms to avoid keeping them alive.
-  for (int i = 0; i < data_->realm_count_; ++i) {
-    Global<Context>& realm = data_->realms_[i];
-    if (realm.IsEmpty()) continue;
-    DisposeModuleEmbedderData(realm.Get(data_->isolate_));
-    realm.Reset();
-  }
+  for (int i = 0; i < data_->realm_count_; ++i)
+    data_->realms_[i].Reset();
   delete[] data_->realms_;
   if (!data_->realm_shared_.IsEmpty())
     data_->realm_shared_.Reset();