diff --git a/src/google/protobuf/compiler/cpp/generator.cc b/src/google/protobuf/compiler/cpp/generator.cc
index ff00e3ab9d..ed39c3d1be 100644
--- a/src/google/protobuf/compiler/cpp/generator.cc
+++ b/src/google/protobuf/compiler/cpp/generator.cc
@@ -177,10 +177,6 @@ bool CppGenerator::Generate(const FileDescriptor* file,
       } while (pos < value.size());
     } else if (key == "unverified_lazy_message_sets") {
       file_options.unverified_lazy_message_sets = true;
-    } else if (key == "message_owned_arena_trial") {
-      // Intentionally left blank to allow early users of MOA trial to wind
-      // down. Removing this would break those users. TODO(b/261651178): remove
-      // this once users-side clean up is done.
     } else if (key == "force_eagerly_verified_lazy") {
       file_options.force_eagerly_verified_lazy = true;
     } else if (key == "experimental_tail_call_table_mode") {