fix(auth): remove userinfoUri as a positional argument

This broke the authentication, because we were expecting the client ID &
client secret.

Signed-off-by: Raito Bezarius <raito@lix.systems>

buildbot_nix/__init__.py

@@ -80,9 +80,8 @@ class OAuth2Config:
     debug: bool = False
 
 class KeycloakOAuth2Auth(OAuth2Auth):
-    def __init__(self, userinfoUri: str, *args, debug=False, **kwargs):
+    def __init__(self, *args, debug=False, **kwargs):
         super().__init__(*args, **kwargs)
-        self.userinfoUri = userinfoUri
         self.debug = debug
 
     def createSessionFromToken(self, token):