delete surplus flush

src/http/modules/ngx_http_uwsgi_module.c

diff --git a/src/http/modules/ngx_http_uwsgi_module.c b/src/http/modules/ngx_http_uwsgi_module.c
index 5884822..2063981 100644
--- a/src/http/modules/ngx_http_uwsgi_module.c
+++ b/src/http/modules/ngx_http_uwsgi_module.c
@@ -831,8 +831,6 @@
             body = body->next;
         }
 
-        b->flush = 1;
-
     } else {
         r->upstream->request_bufs = cl;
     }