Undo accidentally committed change for debugging

Change-Id: Ie62c4d46b767f1dcf70e8e75a30b5fc4d90ac295
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3424897
Auto-Submit: Shu-yu Guo <syg@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78851}

src/snapshot/serializer-deserializer.cc

@@ -14,8 +14,7 @@ namespace {
 DISABLE_CFI_PERF
 void IterateObjectCache(Isolate* isolate, std::vector<Object>* cache,
                         Root root_id, RootVisitor* visitor) {
-  size_t i;
-  for (i = 0;; ++i) {
+  for (size_t i = 0;; ++i) {
     // Extend the array ready to get a value when deserializing.
     if (cache->size() <= i) cache->push_back(Smi::zero());
     // During deserialization, the visitor populates the object cache and