obsoleting the annotate level 2 interface

[Michael Elizabeth Chastain]

David C writes:
> (I don't want to delete them from that file until the whole file is gone,
> but I do want to reproduce the bugs in other files.)

That's my preference too.  Some day I'll be comparing gdb-5.3 to
the gdb 5.4/6.0 release candidate, and this way makes the comparison
either.

> I think I have a patch around to reproduce the watchpoint bug in
> gdb.base/watchpoint.exp; I'll polish that off and submit it.

Sounds good, I'll have my test bed ready for it.

I'll work on the infamous "annotate-quit" test.  I suppose that belongs
in gdb.base/interrupt.exp.

Michael C