Hello,

Here there are several things to notice:

- core GDB no longer refers to TARGET_HAS_HARDWARE_WATCHPOINTS
At one stage target.h had definitions dependant on this macro, but no 
more.  This patch removes the no-longer-needed defintion from 
configurations, such as GNU/Linux.

- procfs.c and i386v-nat.c do refer to TARGET_HAS_HARDWARE_WATCHPOINTS
These files should be replying on an autoconf test.  This patch replaces 
those cases with DEPRECATED_{PROCFS,I386V}_USE_HARDWARE_WATCHPOINTS macros.

That leaves no definition so this patch also removes the corresponding 
documentation.

Comments?
Andrew