remove close in lua-socket, because socket will be closed in connection service

connection/lua-socket.c

@@ -40,13 +40,6 @@ _open(lua_State *L) {
 	return 1;
 }
 
-static int
-_close(lua_State *L) {
-	int fd = luaL_checkinteger(L,1);
-	close(fd);
-	return 0;
-}
-
 static int
 _blockwrite(int fd, const char * buffer, size_t sz) {
 	while (sz > 0) {
@@ -313,7 +306,6 @@ int
 luaopen_socket_c(lua_State *L) {
 	luaL_Reg l[] = {
 		{ "open", _open },
-		{ "close", _close },
 		{ "write", _write },
 		{ "new", _new },
 		{ "push", _push },

lualib/socket.lua

@@ -70,7 +70,6 @@ end
 
 function socket.close()
 	if fd then
-		c.close(fd)
 		skynet.send(".connection","text", "DEL", fd)
 		fd = nil
 	end