try to make pylint happy

dav_registration/signals.py

@@ -5,7 +5,7 @@ from . import emails
 registration_created = Signal(providing_args=['registration'])
 
 
-def send_emails_on_registration(sender, **kwargs):
+def send_emails_on_registration(sender, **kwargs):  # pylint: disable=unused-argument
     registration = kwargs.get('registration')
 
     # Inform the event owner (trainer)
@@ -14,7 +14,7 @@ def send_emails_on_registration(sender, **kwargs):
     email.send()
 
     # Inform the potential participant
-    recipient = u'"{fullname}" <{email}>'.format(fullname=registration.get_full_name(),
-                                                 email=registration.email_address)
+    recipient = '"{fullname}" <{email}>'.format(fullname=registration.get_full_name(),
+                                                email=registration.email_address)
     email = emails.InformSelfRegistrationMail(recipient=recipient, registration=registration)
     email.send()