No! You can't! There is no direct way to withdraw bitcoin like this is some sort of electronic money you have in your paypal. Bitcoins are completely different from electronic money and you cannot just withdraw it. It is like a foreign currency, you need to find someone willing to buy your foreign currency at the price you want. In this case, you need to find a local person that would buy your bitcoins from you, the payment method should also be arranged like bank transactions, cash in person, paypal credits (extremely dangerous and would likely result to a lot of scams). Just do your due diligence when selling.