Yes, you can unlink your bank account from PayPal. To do this, you will need to go to the PayPal website and click on the “Accounts” tab. Under the “Accounts” tab, you will need to select the “Bank Account” option. Once you have selected this option, you will need to click on the “Unlink Account” button.
To remove an existing bank account please follow these instructions:
Go to “My Accounts” from the Account Overview page Log in to your account Click on the link to “Link a Bank Account” in the “Bank Accounts” section. Click on the link labeled “Remove this bank.”
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I don’t know what is the link in this case. Since I quoted it, some parts will automatically show up when you install a new browser add-on that brings to me web traffic (like http://www.facebookstatuses.com/): “Link a Bank Account from the Account Overview page Log in to your account  Click on  the ” Link a Bank Account ”  link in the “Bank Accounts” section.”
Official PayPal language for this feature process:
Add or remove bank accounts You can link as many as three bank accounts to your PayPal account and withdraw your PayPal balance as cash from any of them. You can also add more bank accounts to your PayPal account so that you can transfer funds  to  and  from  several different banks in one transaction, or withdraw cash from multiple banks at a time.
This is not an issue for some people; It won’t be if you are planning on making use of the full spectrum of services offered by this company, which include: fund transfers between paypal accounts as well as with external bank accounts, selling something on ebay or other internet marketplaces (such as amazon.) etc..
