fix: remove unneeded windows check

[bcapener]

The original code we had in our PR #3129

is_static = get_option('default_library') == 'static'
have_netdb = false
if not is_static and host_system != 'windows'
    have_netdb = cc.links(
        '''#include <sys/types.h>
        #include <sys/socket.h>
        #include <netdb.h>
        int main(int argc, char **argv) {
            struct addrinfo hints, *result;
            return getaddrinfo(argv[1], argv[2], &hints, &result);
        }
        ''',
        name: 'netdb',
    )
endif

before the changes got merged the code was changed in the PR #3213 to...

is_static = get_option('default_library') == 'static' and host_system != 'windows'
have_netdb = false
if not is_static
    have_netdb = cc.links(
    ...
endif

Looking closer at it, we don't need to check for windows now that we are using the MSYS2 environment.

[igaw]

Okay, sounds reasonable.

Please add some rational to the commit message. We never know for how long a forge is usable, so we might have to move at some point. Thus commit message should carry the important information. It's obviously nice to have something on github but the git history is really important.

[igaw]

Thanks!