Delete / Supress field "Sample account" when creating a GL account

I would like to hide or deactivate the following field "sample document" that appears in the master record of a GL account. I have been watching the transactions OBC4 and OBD4, but they are not valid in order to do that.

Please delete any sample accounts existing in that particular chart of accounts using transaction FSM5 and save.

Now check sample account filed will be no more appearing in that particular chart of accounts data.

If you once again want to populate the sample account field you can create a sample account using transaction FSM1.