[libstdc++-v3] Remove std::construct and std::destroy

[Gabriel Dos Reis]

Joe Buck <jbuck@synopsys.COM> writes:

| Anything that was well-documented on the SGI STL web site should stay in,
| because lots of programs will use it.

However, that does mean our main implementation should use such
constructs willy-nilly.  Our version is already different from was
once SGI-STL.

In that sens, I completely agree with the proposed patch.

-- Gaby