HTTP/2: removed unused field from ngx_http_v2_stream_t.

src/http/v2/ngx_http_v2.h

diff --git a/src/http/v2/ngx_http_v2.h b/src/http/v2/ngx_http_v2.h
index de67a01..3926e65 100644
--- a/src/http/v2/ngx_http_v2.h
+++ b/src/http/v2/ngx_http_v2.h
@@ -190,8 +190,6 @@
 
     ngx_array_t                     *cookies;
 
-    size_t                           header_limit;
-
     ngx_pool_t                      *pool;
 
     unsigned                         waiting:1;