If each user has their own file, then /remini isn't the command to use. You'd need /remove.

If you had all your users in one file like:
Members.ini contains..

[Members]
Andy=$true
Navid=$true

etc

You'd use:
/remini Members.ini Members Andy

So with the files as it is now use something like..

Code:
on 1:TEXT:!delete *:#: { 
  if ($isfile($+(Members\,$2,.dgt))) && ($isfile($+(Moves\,$2,.moves))) { 
    .remove $+(Members\,$2,.dgt) 
    .remove $+(Moves\,$2,.moves) 
    msg $chan 12Deleted $+($upper($2),'s) stats!
  }
  else { msg $chan $+($chr(3),12,$upper($2) does not have any stats!,$chr(3)) }
}


-Andy