Resolve "Revert "Support custom authentication backends" wasn't done cleanly"

Closes #521 (closed)

aleksis/core/util/core_helpers.py

@@ -210,14 +210,6 @@ def custom_information_processor(request: HttpRequest) -> dict:
 
     return {
         "FOOTER_MENU": CustomMenu.get_default("footer"),
-        "ALTERNATIVE_LOGIN_VIEWS_LIST": [
-            a[0]
-            for a in settings.ALTERNATIVE_LOGIN_VIEWS
-            if a[0] in settings.AUTHENTICATION_BACKENDS
-        ],
-        "ALTERNATIVE_LOGIN_VIEWS": [
-            a for a in settings.ALTERNATIVE_LOGIN_VIEWS if a[0] in settings.AUTHENTICATION_BACKENDS
-        ],
         "ADMINS": settings.ADMINS,
         "PWA_ICONS": regrouped_pwa_icons,
     }