delete never used ngx_ssl_set_nosendshut()

src/core/ngx_connection.h

diff --git a/src/core/ngx_connection.h b/src/core/ngx_connection.h
index 33c7f5b..10799ef 100644
--- a/src/core/ngx_connection.h
+++ b/src/core/ngx_connection.h
@@ -163,11 +163,6 @@
 };
 
 
-#ifndef ngx_ssl_set_nosendshut
-#define ngx_ssl_set_nosendshut(ssl)
-#endif
-
-
 ngx_int_t ngx_set_inherited_sockets(ngx_cycle_t *cycle);
 ngx_int_t ngx_open_listening_sockets(ngx_cycle_t *cycle);
 void ngx_configure_listening_socket(ngx_cycle_t *cycle);