This routine is only available on Doors CSE 8.0 and later for the color-screen TI-84 Plus C Silver Edition.
Deletes a line from a program or AppVar. Ans=1 is the first line of the program, Ans=2 is the second, and so on.
Str0: Name of program to delete from
Ans: Line number to delete (first line is "1"). If Ans=0, this routine instead computes the number of lines in the program and returns them in Theta.
Str9: Contains an error code if an error occurs.