If SpecList is of the form name, then spypoints are removed from procedures with name name and of any arity.
If SpecList is of the form File:Line, where File is a file name and Line is an integer, the the closest matching breakpoint to line Line in the file File is removed.
If SpecList is a variable, all spypoints of visible procedures are removed.
Note that spypoints can also be removed with set_flag(Proc, spy, off).
Success:
    [eclipse]: [user].
     q.
     p :- q, writeln(hi).
     user compiled 112 bytes in 0.00 seconds
    yes.
    [eclipse]: debug.
    Leap mode switched on
    yes.
    [eclipse]: spy writeln/1.
    spypoint added to writeln / 1.
    yes.
    [eclipse]: p.
    B+(3) 1  CALL   writeln(hi) (dbg)?- leap    % type l
    hi
    B+(3) 1  EXIT   writeln(hi) (dbg)?- leap
    yes.
    [eclipse]: nospy writeln/1.
    spypoint removed from writeln / 1.
    yes.
    [eclipse]: p.
    hi
    yes.
Error:
    nospy(I).         (Error 4).
    nospy("l").       (Error 5).
    nospy(foo).       (Error 60).