[binutils-gdb] sim: mcore/microblaze: delete dead code

[sergiodj+buildbot@redhat.com]

*** TEST RESULTS FOR COMMIT 97eca187b3b286c903d78070736bbe1d95721ec4 ***

Author: Mike Frysinger <vapier@gentoo.org>
Branch: master
Commit: 97eca187b3b286c903d78070736bbe1d95721ec4

sim: mcore/microblaze: delete dead code
The mcore port had a few structs/defines that were never used.

Similarly, the microblaze port, because it was copied from mcore, has
that same dead code, and more.  The watchpoint logic was never actually
used.  Punt it all.