Stop the Amarok Last.fm plugin from using KWallet

This makes the Last.fm plugin save your password in plain text –which is more insecure, but avoid using KWallet.

1. Close your wallet in KWallet.
2. Start Amarok and cancel when you want to open your wallet.
3. Go to Last.fm plugin settings, and cancel the new attempt to access the wallet.
4. Enter your account information and Accept.
5. Cancel KWallet one last time.
6. Amarok will ask KWallet is not running. Would you like Amarok to store your credentials in plain text?
7. ¡Siiiiiii!!!!!!
8. Restart Amarok.

Alternatively:

1. Disable KWallet in the Amarok configuration file:
   perl -pi -e 'print STDERR "Reemplazando $&n" if s/(ignoreWallet)=.*/$1=yes/;' ~/.kde/share/config/amarokrc 
2. Restart Amarok.
3. Enter your account in Last.fm settings if you've never saved it as text before.