pgsql: Remove configure probe for struct sockaddr_storage.

Remove configure probe for struct sockaddr_storage.

<sys/socket.h> provides sockaddr_storage in SUSv3 and all targeted Unix
systems have it.  Windows has it too.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/CA%2BhUKG%2BL_3brvh%3D8e0BW_VfX9h7MtwgN%3DnFHP5o7X2oZucY9dg%40mail.gmail.com

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/de42bc3ac8f7205f2c302b402e40704ceb46a70c

Modified Files
--------------
config/c-library.m4        | 14 +-------------
configure                  | 13 -------------
configure.ac               |  1 -
src/include/libpq/pqcomm.h | 23 -----------------------
src/include/pg_config.h.in |  3 ---
src/tools/msvc/Solution.pm |  1 -
6 files changed, 1 insertion(+), 54 deletions(-)