How to avoid typing a password for the default keyring for wireless after booting Ubuntu every time

After booting your Ubuntu, you are always asked to unlock the default keyring for wireless connection, the simple solution to avoid this:

Step 1: delete the following two files:

default.keyring
login.keyring

Find the two files at Place--> Home Folder
.gnome2/keyrings/

Or In Terminal, type the command:

rm ~/.gnome2/keyrings/*keyring

Step 2:
Next time, if it asks to type a default key for the keyring, just left it as blink, and choose unsafe storage.