[binutils-gdb] sim: delete old breakpoint code

[sergiodj+buildbot at redhat dot com]

*** TEST RESULTS FOR COMMIT cec19744887931294e9d4a1dfa4fa8bd42e57ae5 ***

Author: Mike Frysinger <vapier@gentoo.org>
Branch: master
Commit: cec19744887931294e9d4a1dfa4fa8bd42e57ae5

sim: delete old breakpoint code

This code relies on the old sim-break module, but that was deleted in 2003.
The module only existed for gdb to tell the sim to set breakpoints on its
behalf, but then that logic was abandoned in favor of gdb knowing all about
proper breakpoints (since it does already for non-sim targets).  Some dead
code lived on in the older ports though -- clean it up now.