newstruct: How to de-install installed kernel commands

[gorzel]

Taken from the manual:

newstruct("nt","int a,poly b,string c");
nt A;
A;
// c=
// b=??
/ a=0
ring r;
// a pretty print routine for nt:
  proc pretty_print(nt A)
  {
    "nt with string c:"+A.c+" and poly:"+string(A.b);
  }
system("install","nt","print",pretty_print,1); // default printing uses print
A;
// nt with string c: and poly:0

Is there a way to undo what one has installed, so to see the ordinary output as at the beginning?

[Oleksandr]

it is only possible to overwrite the newstruct type. no other functionality is currently available and not planned. Contributions are welcome! :)