[wasm] Remove commented out DCHECK

Change-Id: Ia9b5fd1e5247e4452e18a9212b041891d3ee44ea
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1586839Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61064}

src/wasm/wasm-memory.cc

@@ -465,14 +465,7 @@ bool WasmMemoryTracker::CanFreeSharedMemory_Locked(const void* backing_store) {
   const auto& value = isolates_per_buffer_.find(backing_store);
   // If no isolates share this buffer, backing store can be freed.
   // Erase the buffer entry.
-  if (value == isolates_per_buffer_.end()) return true;
-  if (value->second.empty()) {
-    // If no isolates share this buffer, the global handles to memory objects
-    // associated with this buffer should have been destroyed.
-    // DCHECK(shared_memory_map_.find(backing_store) ==
-    // shared_memory_map_.end());
-    return true;
-  }
+  if (value == isolates_per_buffer_.end() || value->second.empty()) return true;
   return false;
 }