[RFC] Remove last occurences of target_{insert/remove}_watchpoint

[Joel Brobecker]

> I've just ran this version through sparc solaris 8, and
> it survived without regressions (although it looks like solaris test
> results got much worse somewhere along these last weeks -- around
> 1300 fails), and watchpoints still work.  Joel, would you like to
> take a look at this and/or ran it on mips-irix?

I won't have much time in the next few weeks, unfortunately :-(.
But I did run it through the testsuite. The results are really abysmal
but no regression.

        # of expected passes            8361
        # of unexpected failures        2114
        # of unexpected successes       4
        # of expected failures          33
        # of known failures             29
        # of unresolved testcases       33
        # of untested testcases         72
        # of unsupported tests          30

-- 
Joel