Merge pull request #228 from wenzuochao/dev_3.18

remove useless  resource

sdk/resource/tzdata.go

@@ -1,6 +0,0 @@
-package resource
-
-func GetTZData(name string) ([]byte, bool) {
-	data, ok := files["zoneinfo/"+name]
-	return data, ok
-}