We don't redirect to the interpreter for debugging any more, hence we
can remove methods and data structures for storing and accessing
information about functions redirected to the interpreter.

R=thibaudm@chromium.org

Bug: v8:10389
Change-Id: I31ce1ef09748eb65d62910269548bc66eb02e01c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2164795Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67449}