Remove no longed needed .cookie from PartitionOptions initialization

It is now kAllowed by default as of crrev.com/c/4538981

Change-Id: I915c2c1366b0ddbfbcb77f724a7b15622a6d5dbf
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/108690
Auto-Submit: Bartek Nowierski <bartekn@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
diff --git a/core/fxcrt/fx_memory_pa.cpp b/core/fxcrt/fx_memory_pa.cpp
index dfa31d5..f1153cb 100644
--- a/core/fxcrt/fx_memory_pa.cpp
+++ b/core/fxcrt/fx_memory_pa.cpp
@@ -16,9 +16,7 @@
 
 namespace {
 
-constexpr partition_alloc::PartitionOptions kOptions = {
-    .cookie = partition_alloc::PartitionOptions::Cookie::kAllowed,
-};
+constexpr partition_alloc::PartitionOptions kOptions = {};
 
 #ifndef V8_ENABLE_SANDBOX
 partition_alloc::PartitionAllocator& GetArrayBufferPartitionAllocator() {