Style: unneeded casts of cf->args->elts removed.

src/core/nginx.c

diff --git a/src/core/nginx.c b/src/core/nginx.c
index 57f7b22..3335587 100644
--- a/src/core/nginx.c
+++ b/src/core/nginx.c
@@ -1146,7 +1146,7 @@
         return NGX_CONF_OK;
     }
 
-    value = (ngx_str_t *) cf->args->elts;
+    value = cf->args->elts;
 
     ccf->username = (char *) value[1].data;
 
@@ -1352,7 +1352,7 @@
         return "is duplicate";
     }
 
-    value = (ngx_str_t *) cf->args->elts;
+    value = cf->args->elts;
 
     if (ngx_strcmp(value[1].data, "auto") == 0) {
         ccf->worker_processes = ngx_ncpu;