Be warned that this will make your keyring accessible without a password. Period. You don't have to be logged in to view it

With that being said,

I think the simplest way is to set the password for the keyring to an empty password -- you will not be prompted for a password then:

Open Applications -> Accessories -> Password and Encryption Keys
Right-click on the "login" keyring
Select "Change password"
Enter your old password and leave the new password blank
Press ok, read the security warning, think about it and if you still want to get rid of this dialog, choose "use unsafe storage".

This is what i could find for you, i hope this is helpful