--- a/net/server_epoll.lua	Thu Jul 25 12:26:07 2019 +0200
+++ b/net/server_epoll.lua	Fri Jul 26 21:23:53 2019 +0200
@@ -9,7 +9,6 @@
 local t_insert = table.insert;
 local t_concat = table.concat;
 local setmetatable = setmetatable;
-local tostring = tostring;
 local pcall = pcall;
 local type = type;
 local next = next;