GH-102818: Do not call PyTraceBack_Here in sys.settrace trampoline. (GH-104579)

Python/sysmodule.c

@@ -950,10 +950,6 @@ call_trampoline(PyThreadState *tstate, PyObject* callback,
     PyObject *result = _PyObject_FastCallTstate(tstate, callback, stack, 3);
 
     PyFrame_LocalsToFast(frame, 1);
-    if (result == NULL) {
-        PyTraceBack_Here(frame);
-    }
-
     return result;
 }