AL11 tcode deleting Performacne data files.

HI guys ,

I would like to delete AL11 performance file name like AT100001.DAT file .

Goto AL11 -> select name of the directory parameter DIR_DATA and double click on it - > here i need to delete the file name entire row fields are usable viewed changed length owner lastchange lastchange filename .

I would like to delete one row can any one suggest me the solution.