delete useless lines

src/http/ngx_http.c

diff --git a/src/http/ngx_http.c b/src/http/ngx_http.c
index 2a8f427..c708ddf 100644
--- a/src/http/ngx_http.c
+++ b/src/http/ngx_http.c
@@ -191,7 +191,6 @@
         }
 
         module = ngx_modules[m]->ctx;
-        mi = ngx_modules[m]->ctx_index;
 
         if (module->preconfiguration) {
             if (module->preconfiguration(cf) != NGX_OK) {
@@ -292,7 +291,6 @@
         }
 
         module = ngx_modules[m]->ctx;
-        mi = ngx_modules[m]->ctx_index;
 
         if (module->postconfiguration) {
             if (module->postconfiguration(cf) != NGX_OK) {