Upstream: removed unused ngx_http_upstream_conf_t.timeout field.

src/http/ngx_http_upstream.h

diff --git a/src/http/ngx_http_upstream.h b/src/http/ngx_http_upstream.h
index 448d071..d4f52af 100644
--- a/src/http/ngx_http_upstream.h
+++ b/src/http/ngx_http_upstream.h
@@ -151,7 +151,6 @@
     ngx_msec_t                       connect_timeout;
     ngx_msec_t                       send_timeout;
     ngx_msec_t                       read_timeout;
-    ngx_msec_t                       timeout;
     ngx_msec_t                       next_upstream_timeout;
 
     size_t                           send_lowat;