Why resetAutoCommit() in close is necessary?

When connection is newly created or popped from pool, setDesiredAutoCommit is called and AutoCommit is set to desired state, anyway.
When connection is not pooled and really closed, resetting AutoCommit appears to be useless. Because it's going to be closed.
So in both pooled and non pooled case, resetAutoCommit appears to be useless.
And setting when popped and resetting when pushed, it exec “SET AUTOCOMMIT” and it’s taking some time to process.
Shouldn't resetAutoCommit in close be removed?