Remove unused legacy nng_closeall.

include/nng/nng.h

@@ -1420,10 +1420,6 @@ NNG_DECL int nng_listener_setopt_ptr(
 NNG_DECL int nng_listener_setopt_string(
     nng_listener, const char *, const char *) NNG_DEPRECATED;
 
-// nng_closeall closes all open sockets. Do not call this from
-// a library; it will affect all sockets.
-NNG_DECL void nng_closeall(void) NNG_DEPRECATED;
-
 #endif // NNG_ELIDE_DEPRECATED
 
 // nng_init_parameter is used by applications to change a tunable setting.

src/nng_legacy.c

@@ -1,5 +1,5 @@
 //
-// Copyright 2020 Staysail Systems, Inc. <[email protected]>
+// Copyright 2024 Staysail Systems, Inc. <[email protected]>
 //
 // This software is supplied under the terms of the MIT License, a
 // copy of which should be located in the distribution where this
@@ -394,10 +394,4 @@ nng_listener_setopt_string(nng_listener id, const char *n, const char *v)
 	return (nng_listener_set_string(id, n, v));
 }
 
-void
-nng_closeall(void)
-{
-	nni_sock_closeall();
-}
-
 #endif // NNG_ELIDE_DEPRECATED