Removed dead code.

nxt_sockaddr_ntop() stopped being used in commit (git) 029942f.
It has been replaced mostly by nxt_sockaddr_text().

    commit 029942f
    Author: Igor Sysoev <igor@sysoev.ru>
    Date:   Wed Feb 22 15:09:59 2017 +0300

        I/O operations refactoring.

nxt_job_sockaddr_parse() stopped being used in commit (git) 7942480.

    commit 7942480
    Author: Igor Sysoev <igor@sysoev.ru>
    Date:   Wed Mar 4 14:04:08 2020 +0300

        Legacy upstream code removed.

Also, remove functions and types used only by those two functions:

nxt_job_sockaddr_unix_parse()
nxt_job_sockaddr_inet6_parse()
nxt_job_sockaddr_inet_parse()
nxt_job_sockaddr_parse_t
nxt_job_resolve()
nxt_job_resolve_t

Author: alejandro-colomar

auto/sources

@@ -69,7 +69,6 @@ NXT_LIB_SRCS=" \
     src/nxt_event_conn_job_sendfile.c \
     src/nxt_conn_proxy.c \
     src/nxt_job.c \
-    src/nxt_job_resolve.c \
     src/nxt_sockaddr.c \
     src/nxt_listen_socket.c \
     src/nxt_upstream.c \

src/nxt_job_resolve.c

@@ -146,7 +146,6 @@ typedef void (*nxt_event_conn_handler_t)(nxt_thread_t *thr, nxt_conn_t *c);
 #include <nxt_job_file.h>
 #include <nxt_buf_filter.h>
 
-#include <nxt_job_resolve.h>
 #include <nxt_sockaddr.h>
 
 #include <nxt_cache.h>