Limit req: Remove unused struct element

[Robert Paprocki]

# HG changeset patch
# User Robert Paprocki <robert at cryptobells.com>
# Date 1475887216 25200
#      Fri Oct 07 17:40:16 2016 -0700
# Node ID eb5109e432b6138d2a128fd3766be2dbb11974af
# Parent  1606a817c1d48ed351f1dd7d9cb9c996e2c77b9a
Limit req: Remove unused struct element

dummy doesn't appear to be necessary for padding alignment,
and is unused in this module.

diff -r 1606a817c1d4 -r eb5109e432b6
src/http/modules/ngx_http_limit_req_module.c
--- a/src/http/modules/ngx_http_limit_req_module.c Fri Oct 07 16:59:14 2016
+0300
+++ b/src/http/modules/ngx_http_limit_req_module.c Fri Oct 07 17:40:16 2016
-0700
@@ -12,7 +12,6 @@

 typedef struct {
     u_char                       color;
-    u_char                       dummy;
     u_short                      len;
     ngx_queue_t                  queue;
     ngx_msec_t                   last;
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