pgsql-server: Remove inclusion of windows.h now that it is included in

Log Message:
-----------
Remove inclusion of windows.h now that it is included in c.h, per idea
from Peter.

Modified Files:
--------------
    pgsql-server/src/bin/pgevent:
        pgevent.c (r1.3 -> r1.4)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/bin/pgevent/pgevent.c.diff?r1=1.3&r2=1.4)
    pgsql-server/src/bin/psql:
        input.c (r1.37 -> r1.38)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/bin/psql/input.c.diff?r1=1.37&r2=1.38)
        mbprint.c (r1.14 -> r1.15)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/bin/psql/mbprint.c.diff?r1=1.14&r2=1.15)
        startup.c (r1.100 -> r1.101)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/bin/psql/startup.c.diff?r1=1.100&r2=1.101)
    pgsql-server/src/port:
        crypt.c (r1.7 -> r1.8)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/port/crypt.c.diff?r1=1.7&r2=1.8)
        dirmod.c (r1.26 -> r1.27)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/port/dirmod.c.diff?r1=1.26&r2=1.27)
        sprompt.c (r1.8 -> r1.9)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/port/sprompt.c.diff?r1=1.8&r2=1.9)
    pgsql-server/src/timezone:
        zic.c (r1.12 -> r1.13)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/timezone/zic.c.diff?r1=1.12&r2=1.13)