Prunes all choice points created since Choice. Can be used
together with prolog_current_choice/1
to implement ancestral cuts. This predicate is in the hackers
corner because it should not be used in normal Prolog code. It may be
used to create new high level control structures, particularly for
compatibility purposes.
Note that in the current implementation, the pruned choice points and
environment frames are not reclaimed. As a consequence, where
predicates that are deterministic due to clause indexing, normal cuts or
(if->then;else) and and tail recursive run in bounded
local stack space, predicates using prolog_cut_to/1
will run out of stack.
