update_engine: remove global cow version am: c5be0d2159

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/3019783

Change-Id: I5e7c80892a47aeff1dd3ff2af68600b6a47224de
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/payload_generator/payload_generation_config.cc b/payload_generator/payload_generation_config.cc
index 810d0de..470d622 100644
--- a/payload_generator/payload_generation_config.cc
+++ b/payload_generator/payload_generation_config.cc
@@ -214,7 +214,7 @@
     metadata->set_vabc_compression_param(compression_method);
     std::string cow_version;
     if (!store.GetString("virtual_ab_cow_version", &cow_version)) {
-      metadata->set_cow_version(android::snapshot::kCowVersionManifest);
+      metadata->set_cow_version(2);
     } else {
       uint32_t cow_version_num{};
       android::base::ParseUint(cow_version, &cow_version_num);