Remove password length validation on login (close #229)

app/components/modules/LoginForm.jsx

@@ -72,7 +72,6 @@ class LoginForm extends Component {
             validation: values => ({
                 username: ! values.username ? 'Required' : validate_account_name(values.username.split('/')[0]),
                 password: ! values.password ? 'Required' :
-                    values.password.length < 16 ? 'Password must be 16 characters or more' :
                     PublicKey.fromString(values.password) ? 'You need a private password or key (not a public key)' :
                     null,
             })