misc: ngx_http_lua_logby.c: removed duplicate headers.

Author: spacewander

src/ngx_http_lua_logby.c

@@ -22,8 +22,6 @@
 #include "ngx_http_lua_misc.h"
 #include "ngx_http_lua_consts.h"
 #include "ngx_http_lua_shdict.h"
-#include "ngx_http_lua_util.h"
-#include "ngx_http_lua_exception.h"
 #if (NGX_HTTP_LUA_HAVE_MALLOC_TRIM)
 #include <malloc.h>
 #endif