This issue is always interesting to me. Why do people post something that needs to be removed later?
Think about posting before you post. That is a very prudent approach. Be honest to your core values, then you never have to wish to remove something that you might be embarrassed about.
If you are scared that a potential employer might find some insecurity or some boast, then just do not post such a thing. If you are young and plan for your future, just take into consideration what a future potential employer might find, but do it before you post