Revert "redis pipeline"

This reverts commit 471aecd708.

lualib/redis.lua

@@ -4,7 +4,6 @@ local socketchannel = require "socketchannel"
 
 local table = table
 local string = string
-local assert = assert
 
 local redis = {}
 local command = {}
@@ -162,27 +161,6 @@ function command:sismember(key, value)
 	return fd:request(compose_message ("SISMEMBER", {key, value}), read_boolean)
 end
 
-function command:pipeline(ops)
-	assert(#ops > 0, "pipeline is null")
-
-	local fd = self[1]
-
-	local cmds = {}
-	for _, cmd in ipairs(ops) do
-		assert(#cmd >= 2, "pipeline error, the params length is less than 2")
-		table.insert(cmds, compose_message(string.upper(cmd[1]), {cmd[2], cmd[3], cmd[4]}))
-	end
-
-	return fd:request(table.concat(cmds, "\r\n"), function (fd)
-		local result = {}
-		for i=1, #ops do
-			local ok, out = read_response(fd)
-			table.insert(result, {ok = ok, out = out})
-		end
-		return true, result
-	end)
-end
-
 --- watch mode
 
 local watch = {}