Revert "redis pipeline"

This reverts commit 471aecd708.

test/testpipeline.lua

@@ -1,37 +0,0 @@
-local skynet = require "skynet"
-local redis = require "redis"
-
-local conf = {
-	host = "127.0.0.1",
-	port = 6379,
-	db = 0
-}
-
-local function read_table(t)
-    local result = { }
-    for i = 1, #t, 2 do result[t[i]] = t[i + 1] end
-    return result
-end
-
-skynet.start(function()
-	local db = redis.connect(conf)
-
-	local ret = db:pipeline {
-		{"hincrby", "hello", 1, 1},
-		{"del", "hello"},
-		{"hincrby", "hello", 3, 1},
-		{"hgetall", "hello"},
-	}
-
-	print(ret[1].out)
-	print(ret[2].out)
-	print(ret[3].out)
-
-	for k, v in pairs(read_table(ret[4].out)) do
-		print(k, v)
-	end
-
-	db:disconnect()
-	skynet.exit()
-end)
-