How to discard saved password for samba share in unity?

With Seahorse it is possible to edit / remove passwords for network shares.

1. Enter seahorse in Dash.
2. Select Passwords tab, click on the right arrow after the folder icon to drop down the list of passwords.
3. Select your share and right click -> Delete.

At the next mount attempt, you will be required to supply a new password.

Personal folder -> press Ctrl H to see hidden files -> enter .config/nautilus -> delete file servers