If I understand you right, you just want to hide the text in the very last row of your table?
If so, there are various options available.
1st Delete it before by using pass_value in your interface and then do it initializaiton.
2nd Create a global with the linecount in and create a condition in the textfield you want to hide.
Something like gv_tablelines <> gv_actualline.
3rd Add an additional field to the table and pass a flag (print_text = X)
Hope it gives you a solution. Otherwise you have to provide more details what you are trying to do
~Florian